{"product_id":"glass-bloodfin-tetras-tropical-fish-sale-uk","title":"Glass Bloodfin Tetras - Prionobrama Filigera - South American Tetras, Beautiful Schooling Fish Thriving in Freshwater Aquariums, Ideal for Family-Friendly Community Tanks - UK","description":"\u003cp\u003eIf you want a lively, peaceful shoal that looks different from the usual neon-and-red choices, \u003cstrong\u003eGlass Bloodfin Tetras\u003c\/strong\u003e deserve a close look. Known scientifically as \u003cem\u003ePrionobrama filigera\u003c\/em\u003e, these elegant \u003cstrong\u003esouth american tropical fish UK\u003c\/strong\u003e favourites combine a near-transparent silver body with bright red tail highlights that flash as the group turns in midwater. For aquarists searching for \u003cstrong\u003etropical fish UK\u003c\/strong\u003e stock that is active, family-friendly, and suitable for a mixed community, this species is an excellent fit. Adult \u003cstrong\u003eglass bloodfin tetra size\u003c\/strong\u003e reaches around 6 cm, their \u003cstrong\u003eglass bloodfin tetras lifespan\u003c\/strong\u003e is commonly up to 5 years, and their easy-going nature makes \u003cstrong\u003eglass bloodfin tetras for beginners\u003c\/strong\u003e a realistic option when the tank is mature and properly cycled.\u003c\/p\u003e\u003cp\u003eThese fish are especially popular because they bring constant motion without the fin-nipping or territorial behaviour seen in some other characins. They are a classic \u003cstrong\u003eaquarium tetra UK\u003c\/strong\u003e choice for hobbyists who want a true schooling species, and they show best when kept in numbers rather than as a token pair or trio. See our detailed photos showing the translucent body, red caudal fin accents, and streamlined shape that set them apart from heavier-bodied tetras. If you are comparing \u003cstrong\u003ebest tropical fish uk\u003c\/strong\u003e options for a peaceful community aquarium, or wondering \u003cstrong\u003ewhat is a good size fish tank for a beginner\u003c\/strong\u003e, this species offers colour, movement, and manageable care in one smart package.\u003c\/p\u003e\n\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quick Facts\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eScientific Name:\u003c\/strong\u003e \u003cem\u003ePrionobrama filigera\u003c\/em\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCare Level:\u003c\/strong\u003e Easy\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMin Tank Size:\u003c\/strong\u003e 80 litres (around 21 gallons)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 23-28°C (73-82°F)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003epH Range:\u003c\/strong\u003e 6.0-7.5\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLifespan:\u003c\/strong\u003e Up to 5 years\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperament:\u003c\/strong\u003e Peaceful\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiet:\u003c\/strong\u003e Omnivore\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"species-profile\"\u003e\n  \u003ch3\u003eClassification\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrder:\u003c\/strong\u003e Characiformes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFamily:\u003c\/strong\u003e Characidae\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenus:\u003c\/strong\u003e \u003cem\u003ePrionobrama\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThe glass bloodfin tetra belongs to the large characin family, a group that includes many of the most popular freshwater schooling fish in the hobby. As a \u003cstrong\u003efreshwater tetra UK\u003c\/strong\u003e aquarists often choose for active community displays, it stands out for its elongated, glassy body and red tail rather than the deep-bodied shape seen in many common tetras. In the aquarium trade, it is appreciated as a peaceful midwater species that bridges the gap between flashy nano fish and larger, more robust shoalers.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Glass Bloodfin Tetras Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003ePrionobrama filigera\u003c\/em\u003e comes from the Amazon Basin in South America, making it one of the classic \u003cstrong\u003esouth american tropical fish UK\u003c\/strong\u003e keepers enjoy in planted freshwater aquariums. In the wild, these fish are found in warm, soft to moderately mineralised waters with seasonal variation, leaf litter, submerged roots, and open swimming lanes. Their natural environment is not a bright, bare tank. Instead, it is a mix of dappled light, tannin-stained water in some areas, and plenty of cover around the edges.\u003c\/p\u003e\u003cp\u003eThis background explains much of their aquarium behaviour. \u003cstrong\u003eGlass bloodfin tetras habitat\u003c\/strong\u003e includes calm margins and open channels where the shoal can move together while still retreating from larger predators. Their translucent body helps them blend into shifting light, while the red in the tail likely plays a role in shoal recognition. If you want to understand \u003cstrong\u003eglass bloodfin tetras behaviour\u003c\/strong\u003e, think “active but cautious”: they are boldest when kept in a proper group and when the tank has both open space and visual security.\u003c\/p\u003e\u003cp\u003eWild fish would feed on tiny invertebrates, insect matter, plant fragments, and fine organic foods drifting in the water column. That is why a varied captive diet works so well. They are not pond fish, so terms like \u003cstrong\u003etropical fish pond uk\u003c\/strong\u003e or \u003cstrong\u003etropical fish outdoor pond uk\u003c\/strong\u003e do not apply here; these are indoor tropical aquarium fish that need stable warmth year-round. They are also not related to \u003cstrong\u003ewhat fish are native to uk\u003c\/strong\u003e searches, because this species is a true Amazonian characin rather than a local British freshwater fish.\u003c\/p\u003e\u003cp\u003eFor hobbyists comparing shoaling species, they are often included in a \u003cstrong\u003ebest tetra species comparison\u003c\/strong\u003e because they offer a more transparent, streamlined look than many other tetras. If you are looking to \u003cstrong\u003ebuy tetra UK\u003c\/strong\u003e stock that feels a little less common than the standard beginner list, this fish sits in a nice middle ground: more unusual than the average shop tetra, but not so demanding that only specialists can keep it. That also explains why some aquarists searching for \u003cstrong\u003ewild tropical fish uk\u003c\/strong\u003e, \u003cstrong\u003elive tetra UK\u003c\/strong\u003e, or \u003cstrong\u003etetra for sale UK\u003c\/strong\u003e are drawn to this species.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimicking the natural habitat with dark substrate, edge planting, and a clear midwater swimming lane improves confidence, colour, and shoaling behaviour. In my experience, Glass Bloodfin Tetras settle much faster in tanks that feel “framed” by plants rather than exposed on all sides.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow to Set Up the Perfect Tank for Glass Bloodfin Tetras\u003c\/h2\u003e\n\u003cp\u003eA successful \u003cstrong\u003eglass bloodfin tetras tank setup\u003c\/strong\u003e starts with one key idea: these fish are active swimmers. They are not difficult, but they do need horizontal space and the security of a proper group. The recommended \u003cstrong\u003eglass bloodfin tetras minimum tank size\u003c\/strong\u003e is 80 litres, and that should be treated as the floor, not the ideal. For a more natural display and stronger schooling behaviour, a longer tank of 90-120 litres is better. When people ask \u003cstrong\u003eglass bloodfin tetras tank size\u003c\/strong\u003e questions, the answer is simple: longer is more important than taller.\u003c\/p\u003e\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eIf you are wondering \u003cstrong\u003ehow many glass bloodfin tetras in a tank\u003c\/strong\u003e, start with 8 as the minimum shoal and aim for 10-15 if the aquarium allows. In small groups they can look nervous and washed out. In larger groups they become one of the \u003cstrong\u003ebest tetra for community tank\u003c\/strong\u003e displays because the whole shoal moves as a unit. For beginners asking \u003cstrong\u003ewhat size fish should i get\u003c\/strong\u003e, this species suits medium community tanks rather than tiny desktop aquariums.\u003c\/p\u003e\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe ideal \u003cstrong\u003eglass bloodfin tetras water parameters\u003c\/strong\u003e are stable rather than extreme. Keep \u003cstrong\u003eglass bloodfin tetras temperature\u003c\/strong\u003e between 23 and 28°C, with 24-26°C being a very practical everyday target. That makes their preferred range close to standard \u003cstrong\u003etropical fish tank temperature uk\u003c\/strong\u003e recommendations. If you search \u003cstrong\u003etropical fish tank temperature uk celsius\u003c\/strong\u003e or \u003cstrong\u003etropical fish water temperature uk\u003c\/strong\u003e, this species fits neatly into the normal community tropical bracket. \u003cstrong\u003eGlass bloodfin tetras water temperature\u003c\/strong\u003e should not swing sharply from day to night.\u003c\/p\u003e\u003cp\u003eFor chemistry, aim for a \u003cstrong\u003eglass bloodfin tetras pH level\u003c\/strong\u003e of 6.0-7.5, with slightly acidic to neutral often producing the best colour and comfort. \u003cstrong\u003eGlass bloodfin tetras water hardness\u003c\/strong\u003e of 3-15 dGH is acceptable, so they are adaptable to many UK household supplies once acclimated carefully. These are the \u003cstrong\u003eglass bloodfin tetras ideal conditions\u003c\/strong\u003e: clean, oxygen-rich water, moderate current, and consistency. The general \u003cstrong\u003ebloodfin tetra temperature\u003c\/strong\u003e question is easy here: warm tropical, not cool-water.\u003c\/p\u003e\n\u003cdiv class=\"spec-grid\"\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e80L+\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eMinimum tank\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e23-28°C\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eWater temperature\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e6.0-7.5\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003epH range\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e3-15 dGH\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eHardness\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFiltration and Flow\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGlass bloodfin tetras filtration needs\u003c\/strong\u003e are moderate. They appreciate clean water and good oxygenation, but they do not want to be blasted around the tank. A quality external or internal filter with gentle to moderate flow works well. Position spray bars or outlets so there is movement across the surface and a calmer area among plants. A reliable aquarium heater is essential to maintain stable \u003cstrong\u003eglass bloodfin tetras water temperature\u003c\/strong\u003e, especially in cooler UK homes.\u003c\/p\u003e\u003cp\u003eWhen building a community setup, pair them with dependable life-support equipment and a mature biological filter. If you are browsing \u003ca href=\"\/products\/tropical-fish-uk\"\u003etropical fish UK collection fish and setup essentials\u003c\/a\u003e, think in terms of stability: heater, filter, thermometer, and water test kit first, decorations second.\u003c\/p\u003e\n\u003ch3\u003eSubstrate, Plants, and Decor\u003c\/h3\u003e\n\u003cp\u003eA dark sand or fine gravel substrate helps these fish feel secure and makes the red tail stand out. \u003cstrong\u003eGlass bloodfin tetras in planted tank\u003c\/strong\u003e layouts look especially good because the body transparency contrasts beautifully against green stems and darker backgrounds. Use edge planting with open central swimming space. Fine-leaved plants, floating cover, and wood branches all help. In mixed South American style aquascapes, they also pair visually with species such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRoyal Tetras - Inpaichthys Kerri\u003c\/a\u003e, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSplash Tetra - Copella Arnoldi\u003c\/a\u003e, and \u003ca href=\"\/products\/tropical-fish-uk\"\u003eThree-Lined Pencilfish - Nannostomus Trifasciatus\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eLighting\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is ideal. Very intense lighting in a sparsely decorated tank can make them skittish. A planted setup with floating cover softens the light and encourages better midwater activity. This is why a thoughtful \u003cstrong\u003eglass bloodfin tetras aquarium setup\u003c\/strong\u003e matters more than simply meeting the litre count.\u003c\/p\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eChoose a tank of at least 80 litres, preferably longer than tall\u003c\/li\u003e\n    \u003cli\u003eKeep a shoal of 8 or more for natural behaviour\u003c\/li\u003e\n    \u003cli\u003eMaintain 23-28°C with a reliable heater\u003c\/li\u003e\n    \u003cli\u003eTarget pH 6.0-7.5 and hardness 3-15 dGH\u003c\/li\u003e\n    \u003cli\u003eUse plants around the edges and leave open swimming space\u003c\/li\u003e\n    \u003cli\u003eProvide steady filtration with moderate flow and good oxygenation\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Pro Tip\u003c\/h4\u003e\n  \u003cp\u003eAlways cycle the tank for 4-6 weeks before adding Glass Bloodfin Tetras. Even hardy community species can suffer badly from immature filtration, and transparent-bodied fish often show stress quickly through clamped fins and faded colour.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Glass Bloodfin Tetras Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eglass bloodfin tetras diet\u003c\/strong\u003e is omnivorous, which makes feeding straightforward as long as you focus on variety and portion control. In nature they pick at tiny invertebrates and suspended food items. In the aquarium, they do best on a mix of quality flakes, micro pellets, and small frozen foods. A practical \u003cstrong\u003eglass bloodfin tetras feeding guide\u003c\/strong\u003e should include a staple dry food plus regular protein-rich extras to support colour, growth, and breeding condition.\u003c\/p\u003e\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eA good quality flake or mini pellet should form the base of the diet. Many keepers use \u003cstrong\u003etropical fish food uk\u003c\/strong\u003e brands that are easy to source locally, but the key is particle size. Their mouths are small, so choose foods they can finish quickly. Searches like \u003cstrong\u003eamazon uk tropical fish food\u003c\/strong\u003e, \u003cstrong\u003eking british tropical fish food\u003c\/strong\u003e, \u003cstrong\u003eking british tropical fish flake food\u003c\/strong\u003e, \u003cstrong\u003eking british tropical fish flake\u003c\/strong\u003e, and \u003cstrong\u003eking british tropical fish mini pellets\u003c\/strong\u003e all point toward the kind of staple foods that can work for this species when fed sensibly.\u003c\/p\u003e\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eTo bring out stronger red fin colour and better body condition, offer frozen daphnia, cyclops, baby brine shrimp, and finely chopped bloodworm once or twice a week. These foods are especially useful if you are following a detailed \u003cstrong\u003eglass bloodfin tetras care guide\u003c\/strong\u003e or preparing adults for \u003cstrong\u003eglass bloodfin tetras breeding\u003c\/strong\u003e. A varied menu is one of the easiest answers to \u003cstrong\u003ehow to care for glass bloodfin tetras\u003c\/strong\u003e well.\u003c\/p\u003e\n\u003ch3\u003eTreats, Frequency, and Portion Control\u003c\/h3\u003e\n\u003cp\u003eFeed small amounts twice daily, only what the shoal can finish in around 30-60 seconds. In a busy community tank, watch carefully to make sure slower fish are not missing out. For most home aquariums, this simple schedule works well:\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTime\u003c\/th\u003e\n\u003cth\u003eFood\u003c\/th\u003e\n\u003cth\u003eAmount\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMorning\u003c\/td\u003e\n\u003ctd\u003eFine tropical flake or mini pellets\u003c\/td\u003e\n\u003ctd\u003eSmall pinch, fully eaten within 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFlake, micro pellet, or frozen micro-food\u003c\/td\u003e\n\u003ctd\u003eSmall pinch or thawed portion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAquarists often compare local and online sources such as \u003cstrong\u003etropical fish food ebay uk\u003c\/strong\u003e or \u003cstrong\u003eaquarium fish food for sale near me\u003c\/strong\u003e. Source matters less than freshness, correct size, and ingredient quality. Avoid oversized pellets, fatty feeder foods, and anything that sinks too fast for a midwater shoaler to catch comfortably.\u003c\/p\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eExplore suitable tropical fish food options for small community tetras\u003c\/a\u003e\n  \u003cp\u003eChoose fine flake and mini pellet foods that match the small mouth size and active feeding style of Glass Bloodfin Tetras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Feeding Warning\u003c\/h4\u003e\n  \u003cp\u003eOverfeeding causes ammonia spikes, cloudy water, and poor oxygen levels. Because Glass Bloodfin Tetras are active at feeding time, owners often assume they are still hungry when they are simply excited by movement.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Do Glass Bloodfin Tetras Look Like? Colors, Patterns \u0026amp; Varieties\u003c\/h2\u003e\n\u003cp\u003eThe standout feature of this species is right in the name. The body is slender and translucent, giving the fish a delicate “glass” look, while the tail shows a vivid blood-red tone that flashes when the shoal turns together. Adult \u003cstrong\u003eglass bloodfin tetra size\u003c\/strong\u003e and \u003cstrong\u003eglass bloodfin tetras size\u003c\/strong\u003e usually top out around 6 cm, so they are larger than many nano tetras but still very manageable in a community setup.\u003c\/p\u003e\u003cp\u003eThey are not heavy-bodied like some common tetra species. Instead, they have a more elongated profile that suits open-water swimming. This makes them a striking option among \u003cstrong\u003ecolourful tropical fish uk\u003c\/strong\u003e choices because the effect comes from movement and contrast rather than heavy metallic colour. In a well-kept aquarium, the red tail is clean and bright, the body remains clear rather than dull, and the fins are held open confidently.\u003c\/p\u003e\u003cp\u003eIf you are trying to identify \u003cstrong\u003eglass bloodfin tetras male vs female\u003c\/strong\u003e, females are usually a little fuller-bodied, especially when carrying eggs, while males often appear slimmer and slightly more streamlined. The difference is subtle, so sexing young fish is not always easy. They are sometimes compared by shoppers browsing terms like \u003cstrong\u003ered cherry tetra uk\u003c\/strong\u003e, \u003cstrong\u003echerry red congo tetra for sale\u003c\/strong\u003e, or even \u003cstrong\u003erare tropical fish uk\u003c\/strong\u003e, but Glass Bloodfins have a cleaner, more transparent look than those deeper-coloured species.\u003c\/p\u003e\u003cp\u003eOur photos show the contrast between the translucent body and red tail best when the fish are settled, well fed, and kept over a darker substrate. They are not \u003cstrong\u003elarge tropical fish uk\u003c\/strong\u003e stock, but they create a bigger visual impact than their size suggests. For aquarists seeking \u003cstrong\u003etropical fish uk freshwater\u003c\/strong\u003e species that look refined rather than flashy, they are a very smart choice.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Glass Bloodfin Tetras? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGlass bloodfin tetras tank mates\u003c\/strong\u003e should be chosen with two things in mind: this species is peaceful, and it is active. They do best with similarly non-aggressive community fish that enjoy warm, clean water and do not see small characins as food. In a mixed aquarium, they are often considered among the \u003cstrong\u003ebest tetra for community tank\u003c\/strong\u003e setups because they occupy the middle region, leave bottom fish alone, and rarely cause trouble when kept in a proper shoal.\u003c\/p\u003e\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eGood \u003cstrong\u003eglass bloodfin tetra tank mates\u003c\/strong\u003e include other peaceful South American species, pencilfish, calm tetras, small Corydoras, and some dwarf cichlids in larger tanks. They also work well in \u003cstrong\u003ecommunity tropical fish uk\u003c\/strong\u003e aquariums where the overall theme is active but non-aggressive fish. If you enjoy unusual characins, consider compatible display partners such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSailfin Tetra - Crenuchus Spilurus\u003c\/a\u003e, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSplash Tetra - Copella Arnoldi\u003c\/a\u003e, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRoyal Tetras - Inpaichthys Kerri\u003c\/a\u003e, and \u003ca href=\"\/products\/tropical-fish-uk\"\u003eThree-Lined Pencilfish - Nannostomus Trifasciatus\u003c\/a\u003e. These species share similar water preferences and create a layered South American community.\u003c\/p\u003e\u003cp\u003eSome keepers also ask about \u003cstrong\u003epenguin tetra tank mates\u003c\/strong\u003e because the same peaceful, active logic applies. If a fish is suitable for penguin tetras, it is often worth considering for Glass Bloodfins too, provided size and temperament match.\u003c\/p\u003e\n\u003ch3\u003eSpecies to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid fin-nippers, very boisterous barbs, and predatory characins. Fish that are simply too large can also be risky. For example, species like \u003ca href=\"\/products\/tropical-fish-uk\"\u003eBucktooth Tetra - Exodon Paradoxus -\u003c\/a\u003e are not suitable companions because their behaviour is far too aggressive for this peaceful shoaler. Likewise, larger predators such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eGar Characins - Ctenolucius Hujeta\u003c\/a\u003e or massive omnivores like \u003ca href=\"\/products\/tropical-fish-uk\"\u003ePiaractus Brachypomus - Red-Bellied Pacu -\u003c\/a\u003e and \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRed-Bellied Pacu - Piaractus Brachypomus\u003c\/a\u003e are not appropriate tank mates despite sharing a South American origin.\u003c\/p\u003e\n\u003ch3\u003eCommunity Stocking Examples\u003c\/h3\u003e\n\u003cp\u003eIn an 80-100 litre aquarium, a group of 10 Glass Bloodfin Tetras with a peaceful bottom group can work very well. In a 120 litre tank, you can build a more complete South American display with 12-15 Glass Bloodfins, a pencilfish group, and a calm bottom species. This answers the common question of \u003cstrong\u003eglass bloodfin tetras with other fish\u003c\/strong\u003e: yes, they mix well, but only with species chosen for size and temperament.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecies\u003c\/th\u003e\n\u003cth\u003eCompatible?\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eRoyal Tetras - Inpaichthys Kerri\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003ePeaceful, similar water needs, good midwater contrast\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eThree-Lined Pencilfish - Nannostomus Trifasciatus\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eOccupies upper levels and complements a planted setup\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eBucktooth Tetra - Exodon Paradoxus -\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e❌ Avoid\u003c\/td\u003e\n\u003ctd\u003eToo aggressive for a peaceful shoaling tetra\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eInvertebrate compatibility is mixed. Adult shrimp may be left alone in a dense aquascape, but tiny shrimplets can be eaten. Snails are generally fine. If you are planning \u003cstrong\u003eglass bloodfin tetras compatible fish\u003c\/strong\u003e for a display tank, think calm, similarly sized, and non-predatory first.\u003c\/p\u003e\u003cp\u003eFor shoppers researching \u003cstrong\u003ebuy live fish online uk\u003c\/strong\u003e, \u003cstrong\u003ebuy tropical fish online uk free delivery\u003c\/strong\u003e, \u003cstrong\u003etropical fish uk for sale\u003c\/strong\u003e, \u003cstrong\u003ebest place to buy tropical fish online uk\u003c\/strong\u003e, \u003cstrong\u003ebuy glass bloodfin tetras UK\u003c\/strong\u003e, \u003cstrong\u003eglass bloodfin tetras for sale UK\u003c\/strong\u003e, \u003cstrong\u003eglass bloodfin tetras online UK\u003c\/strong\u003e, \u003cstrong\u003eorder glass bloodfin tetras UK\u003c\/strong\u003e, \u003cstrong\u003eglass bloodfin tetras delivery UK\u003c\/strong\u003e, \u003cstrong\u003ewhere to buy glass bloodfin tetras UK\u003c\/strong\u003e, and \u003cstrong\u003eglass bloodfin tetras shop UK\u003c\/strong\u003e, compatibility information matters just as much as price. A healthy shoal in the right community always performs better than a bargain fish added to the wrong tank.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Compatibility Tip\u003c\/h4\u003e\n  \u003cp\u003eAlways quarantine new arrivals for 2-4 weeks before adding them to an established community tank. Even peaceful species can introduce parasites or bacterial issues that spread quickly through a shoal.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow to Breed Glass Bloodfin Tetras: Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGlass bloodfin tetras breeding\u003c\/strong\u003e is classed as moderate rather than truly easy. They are egg scatterers, and like many tetras they may spawn in the community tank without producing surviving fry. If you want to raise young successfully, set up a separate breeding aquarium. This species is one of the more interesting \u003cstrong\u003etropical fish breeds uk\u003c\/strong\u003e hobbyists can work with when moving beyond basic livebearers.\u003c\/p\u003e\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eUse a small separate tank with soft, slightly acidic water, subdued lighting, and fine-leaved plants or spawning mops. Keep the \u003cstrong\u003eglass bloodfin tetras pH level\u003c\/strong\u003e toward the lower end of their range and the temperature around 26-27°C. Condition adults with a rich, varied diet of live or frozen foods. A pair or small group can be used, but many breeders prefer one female with two males.\u003c\/p\u003e\n\u003ch3\u003eMale vs Female and Spawning Behaviour\u003c\/h3\u003e\n\u003cp\u003eWhen discussing \u003cstrong\u003eglass bloodfin tetras male vs female\u003c\/strong\u003e, females are generally rounder through the belly, especially when full of eggs. Males tend to be slimmer and more active in courtship. Spawning usually happens in the morning, often after a water change or slight temperature cue. The adults scatter eggs among plants and do not provide parental care.\u003c\/p\u003e\n\u003ch3\u003eEgg and Fry Care\u003c\/h3\u003e\n\u003cp\u003eRemove the adults after spawning because they may eat the eggs. Keep the tank dim, as eggs and fry can be light-sensitive. Hatching usually occurs within a day or two depending on conditions, and the fry will need infusoria or other very small first foods before moving onto freshly hatched brine shrimp. Good hygiene and tiny, regular feeds are the secret to raising them.\u003c\/p\u003e\u003cp\u003eFor aquarists interested in \u003cstrong\u003euk tropical fish breeders\u003c\/strong\u003e methods, the biggest challenge is not getting the fish to spawn but getting enough fry through the first two weeks. Stable water quality matters more than chasing exact numbers. Well-kept adults show stronger fertility, better colour, and overall better \u003cstrong\u003eglass bloodfin tetras health\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse a mesh or marbles on the breeding tank bottom so eggs fall out of reach immediately after spawning. This simple step often makes a bigger difference than any fine adjustment to pH or hardness.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eGlass Bloodfin Tetras vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eComparison matters because many aquarists want a peaceful shoaling fish but are unsure whether to choose Glass Bloodfins, neons, cardinals, embers, or rummy noses. Each creates a different look in the aquarium. If you are doing a \u003cstrong\u003ebest tetra species comparison\u003c\/strong\u003e, Glass Bloodfins stand out for movement, transparency, and a slightly larger, more elongated profile.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eGlass Bloodfin Tetra\u003c\/th\u003e\n\u003cth\u003eNeon Tetra\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Size\u003c\/td\u003e\n\u003ctd\u003e6 cm\u003c\/td\u003e\n\u003ctd\u003e4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eEasy\u003c\/td\u003e\n\u003ctd\u003eEasy\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e23-28°C\u003c\/td\u003e\n\u003ctd\u003e22-26°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£21.29\u003c\/td\u003e\n\u003ctd\u003eVaries\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eActive midwater shoals in medium tanks\u003c\/td\u003e\n\u003ctd\u003eClassic colour in planted community tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eGlass Bloodfin Tetra\u003c\/th\u003e\n\u003cth\u003eRummy Nose Tetra\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Style\u003c\/td\u003e\n\u003ctd\u003eTransparent, elongated\u003c\/td\u003e\n\u003ctd\u003eSilver with red head and striped tail\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSchooling Style\u003c\/td\u003e\n\u003ctd\u003eActive, loose to medium shoal\u003c\/td\u003e\n\u003ctd\u003eTighter coordinated shoal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Sensitivity\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eBalanced community tanks\u003c\/td\u003e\n\u003ctd\u003eExperienced planted-tank keepers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVisual Effect\u003c\/td\u003e\n\u003ctd\u003eSubtle elegance and red tail flashes\u003c\/td\u003e\n\u003ctd\u003eBold face colour and precision schooling\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are weighing \u003cstrong\u003eglass bloodfin tetras vs neon tetra\u003c\/strong\u003e, choose Glass Bloodfins when you want a larger, more transparent fish with stronger open-water movement. For \u003cstrong\u003eglass bloodfin tetras vs cardinal tetra\u003c\/strong\u003e, cardinals offer more solid colour, while Glass Bloodfins offer a lighter, more refined look. In the \u003cstrong\u003eglass bloodfin tetras or ember tetra\u003c\/strong\u003e debate, embers are better for smaller tanks and warmer orange colour palettes, while Glass Bloodfins suit longer tanks and more active displays. For \u003cstrong\u003eglass bloodfin tetras vs rummy nose tetra\u003c\/strong\u003e, rummy noses are famous for tight schooling but can be less forgiving of unstable water.\u003c\/p\u003e\u003cp\u003eIf you like the idea of unusual characins, compare them with \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSailfin Tetra - Crenuchus Spilurus\u003c\/a\u003e for a more specialised look or \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRoyal Tetras - Inpaichthys Kerri\u003c\/a\u003e for deeper body colour. Glass Bloodfins are usually the better all-rounder for a peaceful, active community.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Glass Bloodfin Tetras \u0026amp; How to Prevent Them\u003c\/h2\u003e\n\u003cp\u003eHealthy Glass Bloodfin Tetras are alert, midwater-active, and feed eagerly. The body should look clear rather than milky, the fins should be open, and the red tail should be distinct. Poor colour, clamped fins, hanging near the surface, or isolating from the shoal can all signal stress. As with many \u003cstrong\u003ecommon tropical fish uk\u003c\/strong\u003e species, most health issues begin with water quality or transport shock rather than rare disease.\u003c\/p\u003e\n\u003ch3\u003eCommon Diseases and Symptoms\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGlass bloodfin tetras diseases\u003c\/strong\u003e can include ich, bacterial fin damage, and stress-related losses after sudden parameter changes. Because they are transparent-bodied, internal stress can show quickly through faded appearance and reduced activity. Monitor closely after introduction, especially if fish have been shipped. This matters whether customers search \u003cstrong\u003ebest online tropical fish uk\u003c\/strong\u003e, \u003cstrong\u003ebest tropical fish delivery uk\u003c\/strong\u003e, or \u003cstrong\u003ebuy tropical fish online uk\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eTreatment and Prevention\u003c\/h3\u003e\n\u003cp\u003eThe best treatment plan starts with diagnosis, isolation if needed, and water testing. In many cases, increased aeration, partial water changes, and correcting temperature or ammonia issues solve the root problem. A stable heater, mature filter, and sensible stocking level are better than relying on medication. If you are comparing \u003cstrong\u003ebest tropical fish tanks uk\u003c\/strong\u003e for community species, prioritise tank footprint and filtration quality over decorative gimmicks.\u003c\/p\u003e\u003cp\u003eFor prevention, quarantine all new fish, feed a varied diet, and avoid mixing them with aggressive species. This species is not difficult, but it does not tolerate repeated swings in temperature or poor maintenance. That is why even shoppers looking for \u003cstrong\u003ebuy tropical fish online uk cheap\u003c\/strong\u003e, \u003cstrong\u003echeapest tropical fish\u003c\/strong\u003e, or \u003cstrong\u003ebiggest tropical fish shop uk\u003c\/strong\u003e should focus on condition and husbandry rather than price alone. A cheap fish that arrives stressed costs more in the long run.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Health Warning\u003c\/h4\u003e\n  \u003cp\u003eNever medicate the whole display tank without confirming the diagnosis first. Many problems that look like disease are actually caused by ammonia, nitrite, or sudden temperature drops.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuarantine Protocol\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eUse a separate heated and filtered tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eObserve feeding response, fin condition, and swimming posture daily\u003c\/li\u003e\n    \u003cli\u003eTest ammonia and nitrite frequently in the first week\u003c\/li\u003e\n    \u003cli\u003eOnly move fish to the main aquarium when fully settled and symptom-free\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"behavior\"\u003eUnderstanding Glass Bloodfin Tetra Behavior in the Aquarium\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eGlass bloodfin tetras behaviour\u003c\/strong\u003e is one of the main reasons people enjoy them so much. They are active, constantly on the move, and most comfortable in a visible shoal. Unlike shy species that vanish into plants all day, Glass Bloodfins spend much of their time in open water, especially once settled. Their preferred zone is the middle of the tank, where they patrol back and forth in loose formation.\u003c\/p\u003e\u003cp\u003eThey are not aggressive, but they are social. Keeping too few often leads to nervous pacing or washed-out colour. A proper group answers the common question of \u003cstrong\u003ehow many glass bloodfin tetras in a tank\u003c\/strong\u003e: enough to create confidence. In a mature aquarium with plants, current, and open swimming room, they show the natural stop-start movement that makes them so attractive.\u003c\/p\u003e\u003cp\u003eThey are excellent \u003cstrong\u003eglass bloodfin tetras with other fish\u003c\/strong\u003e when tank mates are chosen sensibly. During feeding they become more animated, and during breeding condition males may display more actively around females. Overall, they are one of the better examples of \u003cstrong\u003eglass bloodfin tetras ideal conditions\u003c\/strong\u003e translating directly into visible behaviour: the better the setup, the better the shoal performs.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eGlass Bloodfin Tetras are at their best when they arrive as a strong, even-sized shoal that settles quickly into midwater and feeds from day one. That matters with this species because confidence is group-based; mixed-size, weak, or underconditioned fish take longer to colour up and can disrupt schooling. We select this species for active community aquariums where customers want a peaceful shoaler with a more refined look than the usual tetra staples.\u003c\/p\u003e\u003cp\u003eBefore dispatch, fish are observed for feeding response, body clarity, fin condition, and shoaling behaviour. This is especially important for transparent species, where stress shows quickly. Fish are prepared for UK home aquariums with stable tropical holding conditions, then packed in insulated boxes with appropriate seasonal protection, including heat packs in winter when needed. Tracked delivery helps reduce time in transit, and careful bagging limits sloshing stress for active midwater fish.\u003c\/p\u003e\u003cp\u003eFor buyers comparing \u003cstrong\u003efresh water aquarium fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003efreshwater aquarium fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003efreshwater tropical fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003elive aquarium fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003elive tropical fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003elive tropical fish for sale near me cheap\u003c\/strong\u003e, \u003cstrong\u003elive tropical fish online uk\u003c\/strong\u003e, \u003cstrong\u003eaquarium fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003eaquarium fish on sale near me\u003c\/strong\u003e, \u003cstrong\u003eaquarium and fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003eaquarium fish tanks for sale near me\u003c\/strong\u003e, or even \u003cstrong\u003egumtree tropical fish for sale near me\u003c\/strong\u003e, the real difference is consistency and aftercare. We also know customers often ask \u003cstrong\u003ehow much are tropical fish to buy\u003c\/strong\u003e; the better question is whether the fish are healthy, feeding, and suitable for your setup.\u003c\/p\u003e\u003cp\u003eThese are freshwater community fish, not marine stock, so searches like \u003cstrong\u003emarine aquarium fish for sale near me\u003c\/strong\u003e or \u003cstrong\u003elarge tropical fish for sale near me\u003c\/strong\u003e are not the right category. If you want a peaceful shoal with elegant movement and easy community compatibility, order your Glass Bloodfin Tetras today with confidence.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Glass Bloodfin Tetras\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eShoal-focused selection so the group settles and schools naturally\u003c\/li\u003e\n    \u003cli\u003ePre-dispatch observation for feeding response, fin condition, and clear body appearance\u003c\/li\u003e\n    \u003cli\u003ePacked for UK transit with insulated materials and seasonal heat protection where required\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"related-products\"\u003eYou Might Also Like\u003c\/h2\u003e\n\u003cp\u003eBuild a more complete South American display with carefully chosen companions and contrasts. \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRoyal Tetras - Inpaichthys Kerri\u003c\/a\u003e add deeper body colour beside the transparent look of Glass Bloodfins. \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSplash Tetra - Copella Arnoldi\u003c\/a\u003e brings unusual top-level behaviour to a planted community. \u003ca href=\"\/products\/tropical-fish-uk\"\u003eThree-Lined Pencilfish - Nannostomus Trifasciatus\u003c\/a\u003e suits the same warm, peaceful setup and occupies the upper layers beautifully. If you want another unusual characin to compare, see \u003ca href=\"\/products\/tropical-fish-uk\"\u003eSailfin Tetra - Crenuchus Spilurus\u003c\/a\u003e. For larger predatory or display fish from the same broad region, browse \u003ca href=\"\/products\/tropical-fish-uk\"\u003eGar Characins - Ctenolucius Hujeta\u003c\/a\u003e and \u003ca href=\"\/products\/tropical-fish-uk\"\u003ePiaractus Brachypomus - Red-Bellied Pacu -\u003c\/a\u003e separately for species-only planning rather than community mixing.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"2-3 cm","offer_id":57469568188751,"sku":"2370","price":25.99,"currency_code":"GBP","in_stock":false},{"title":"\u003e 4.5","offer_id":57560367759695,"sku":"2372","price":4.99,"currency_code":"GBP","in_stock":true},{"title":"3.5 cm","offer_id":57560367792463,"sku":"2371","price":3.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/tropical-fish-uk-x-glass-bloodfin-tetras-hero-driftwood-2370.webp?v=1776544026","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/glass-bloodfin-tetras-tropical-fish-sale-uk","provider":"Tropical Fish Co","version":"1.0","type":"link"}