{"product_id":"ruby-tetra-super-blue-emperor-diamond-flame-red-peru-hyphessobrycon-margitae","title":"Hyphessobrycon margitae (Red Blue Peru Tetra) - UK","description":"\u003cp\u003eIf you want a small tetra that looks far more exotic than its size suggests, \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e deserves a place on your shortlist. Often sold as the \u003cstrong\u003eRed Blue Peru Tetra\u003c\/strong\u003e, Margit’s tetra combines warm ruby tones with cool metallic blue flashes that intensify in soft, tannin-rich water. This \u003cstrong\u003eSouth American tetra UK\u003c\/strong\u003e hobbyists seek out stays compact at around 4 cm, lives for up to 5 years, and suits aquarists who enjoy a \u003cstrong\u003ecolourful tetra for planted tank\u003c\/strong\u003e displays rather than loud, boisterous community fish. It is a \u003cstrong\u003epeaceful rare schooling fish\u003c\/strong\u003e from Peru’s Amazon basin, best kept in a proper group where its confidence and colour both improve.\u003c\/p\u003e\n\u003cp\u003eFor fishkeepers building a blackwater or lush aquascape, \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e stands out as a \u003cstrong\u003evibrant rare tetra for aquarium\u003c\/strong\u003e layouts. Its manageable care needs, modest \u003cstrong\u003ered blue oeru tetra tank size\u003c\/strong\u003e requirement, and gentle temperament make it a strong choice for a \u003cstrong\u003eHyphessobrycon margitae community tank\u003c\/strong\u003e. See our detailed photos showing the contrast of red flanks and blue iridescence in shaded planting, and you will understand why many hobbyists compare it to a \u003cstrong\u003eDiamond Flame Tetra\u003c\/strong\u003e, \u003cstrong\u003eruby tetra\u003c\/strong\u003e, or even a \u003cstrong\u003esuper blue emperor tetra\u003c\/strong\u003e in terms of visual impact. If you want a rare tetra that rewards good husbandry with outstanding colour and elegant schooling behaviour, this species is an excellent pick.\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\u003eHyphessobrycon margitae\u003c\/em\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCare Level:\u003c\/strong\u003e Moderate\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMin Tank Size:\u003c\/strong\u003e 60 litres (around 13 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 5.0-7.0\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, schooling\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\u003eHyphessobrycon\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e belongs to the large characin family that includes many of the best-known aquarium tetras. In the hobby, it sits among the more unusual Peruvian species and is valued by aquascapers looking for a refined alternative to common mass-market tetras. It is unrelated to true emperor tetras, but hobbyists often compare its colour intensity and display behaviour with emperor-type fish and other small red-blue characins.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Hyphessobrycon margitae Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHyphessobrycon margitae habitat\u003c\/strong\u003e is in Peru within the Amazon basin, where slow-moving forest waters, leaf litter, submerged roots, and seasonal tannins shape the conditions these fish evolved in. The \u003cstrong\u003eruby tetra origin\u003c\/strong\u003e often confuses hobbyists because common names vary between shops, but this species is firmly associated with Peruvian waters and is best thought of as a specialist \u003cstrong\u003efreshwater tetra UK\u003c\/strong\u003e keepers can use for a South American-style setup.\u003c\/p\u003e\n\u003cp\u003eIn the wild, the \u003cstrong\u003eruby tetra habitat\u003c\/strong\u003e is typically soft and acidic, with dim light filtered through overhanging vegetation. That natural setting explains why this fish shows its best colour in a planted aquarium with dark substrate and some shaded zones. The \u003cstrong\u003eruby tetra natural habitat\u003c\/strong\u003e also contains tiny aquatic invertebrates, insect larvae, organic detritus, and fine plant matter, which helps explain its omnivorous feeding habits in captivity.\u003c\/p\u003e\n\u003cp\u003eBecause it comes from calm, structured environments, the \u003cstrong\u003eRed Blue Oeru Tetra\u003c\/strong\u003e does not appreciate harsh flow or stark, bare tanks. Replicating the \u003cstrong\u003ewild ruby tetra\u003c\/strong\u003e environment with driftwood, botanicals, and soft water can make a dramatic difference to confidence, colour, and schooling behaviour. For aquarists keeping \u003cstrong\u003erare tropical fish UK\u003c\/strong\u003e collections, this species offers a genuine biotope feel without the size demands of larger characins.\u003c\/p\u003e\n\u003cp\u003eUseful habitat targets include a \u003cstrong\u003ered blue oeru tetra pH range\u003c\/strong\u003e of 5.0 to 7.0, low mineral content, and stable warmth. If you are comparing species, the \u003cstrong\u003ered blue oeru tetra vs neon tetra\u003c\/strong\u003e question usually comes down to subtlety: neons are bolder and more familiar, while \u003cem\u003eH. margitae\u003c\/em\u003e is rarer, warmer in tone, and especially effective in blackwater or heavily planted displays.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimicking the natural habitat improves health and brings out natural behaviour. In our experience, adding leaf litter, floating plants, and darker décor often deepens the red-blue sheen within a few weeks, especially in fish that looked pale in bright retail tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow to Set Up the Perfect Tank for Hyphessobrycon margitae\u003c\/h2\u003e\n\u003cp\u003eA successful \u003cstrong\u003ered blue oeru tetra care guide\u003c\/strong\u003e starts with one principle: think soft, stable, planted, and calm. Although this species is not especially large, it is still an active schooling fish that needs room to move as a group. The minimum \u003cstrong\u003ered blue oeru tetra tank size\u003c\/strong\u003e is 60 litres, but a 75-90 litre aquarium is much better if you want a fuller school and more natural behaviour. The same advice applies if you searched for \u003cstrong\u003eruby tetra tank size\u003c\/strong\u003e or \u003cstrong\u003ediamond flame tetra minimum group size\u003c\/strong\u003e; these fish look and behave better in numbers.\u003c\/p\u003e\n\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eThe baseline \u003cstrong\u003eruby tetra tank size\u003c\/strong\u003e is 60 litres for a small group of 6, though 8-12 fish is more realistic for display quality. A larger footprint matters more than height because this species uses the middle water column and benefits from horizontal swimming space. If you want a true \u003cstrong\u003ediamond flame tetra school size\u003c\/strong\u003e effect with synchronized movement, start with at least 8 specimens.\u003c\/p\u003e\n\u003cp\u003eFor aquascapers designing a \u003cstrong\u003ered blue oeru tetra tank setup\u003c\/strong\u003e, aim for dense planting at the back and sides, open swimming space in the centre, and a few shaded retreats. This layout reduces stress and helps establish a stronger pecking order without aggression. It also supports their role as a \u003cstrong\u003ediamond flame tetra for planted aquarium\u003c\/strong\u003e style fish.\u003c\/p\u003e\n\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe most reliable \u003cstrong\u003ered blue oeru tetra water parameters\u003c\/strong\u003e are 23-28°C, pH 5.0-7.0, and hardness 2-10 dGH. The ideal \u003cstrong\u003eHyphessobrycon margitae temperature range\u003c\/strong\u003e for colour and activity is 24-26°C. If you were searching for \u003cstrong\u003ered blue oeru tetra temperature\u003c\/strong\u003e, \u003cstrong\u003eruby tetra temperature\u003c\/strong\u003e, or \u003cstrong\u003eruby tetra water temp\u003c\/strong\u003e, this is the range to remember.\u003c\/p\u003e\n\u003cp\u003eSoft water is especially helpful. The preferred \u003cstrong\u003ediamond flame tetra water hardness\u003c\/strong\u003e sits in the lower end of the range, around 2-6 dGH, though captive fish can adapt to slightly harder conditions if changes are gradual. Stable \u003cstrong\u003eruby tetra water parameters\u003c\/strong\u003e matter far more than chasing extremes, so avoid sudden shifts in pH or temperature.\u003c\/p\u003e\n\n\u003cdiv class=\"spec-grid\"\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e23-28°C\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eTemperature\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e5.0-7.0\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003epH\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e2-10 dGH\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eHardness\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e60L+\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eMinimum Tank\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eFiltration and Flow\u003c\/h3\u003e\n\u003cp\u003eGentle filtration works best. A mature sponge filter or a compact external filter with spray-bar diffusion is ideal because it keeps water clean without pushing the fish around. These are not riverine tetras, so avoid excessive current. Fine mechanical filtration plus biological media is enough for most setups, especially if the tank is planted and lightly stocked.\u003c\/p\u003e\n\u003cp\u003eIf you are building a calm tetra aquarium, pair this species with dependable life-support equipment such as an \u003ca href=\"\/collections\/aquarium-filters\"\u003eaquarium filter for planted tanks\u003c\/a\u003e and a reliable \u003ca href=\"\/collections\/aquarium-heaters\"\u003ethermostatic aquarium heater\u003c\/a\u003e. Stable heat and oxygenation will do more for long-term health than chasing expensive additives.\u003c\/p\u003e\n\n\u003ch3\u003eSubstrate, Plants and Decor\u003c\/h3\u003e\n\u003cp\u003eA dark sand or fine gravel substrate makes the fish feel secure and visually intensifies the red body tones. Add driftwood, seed pods, and leaf litter for a blackwater effect. For planting, use species such as Cryptocoryne, Java fern, Anubias, Amazon swords, and floating Salvinia or frogbit to diffuse light. This is exactly why many hobbyists describe it as a \u003cstrong\u003ecolourful tetra for planted tank\u003c\/strong\u003e projects and a \u003cstrong\u003ediamond flame tetra for planted aquarium\u003c\/strong\u003e display fish.\u003c\/p\u003e\n\u003cp\u003eTo complete the look, combine natural décor with easy greenery from our \u003ca href=\"\/collections\/live-aquarium-plants\"\u003elive aquarium plants collection\u003c\/a\u003e and root-friendly \u003ca href=\"\/collections\/aquarium-substrate\"\u003eaquarium substrate options\u003c\/a\u003e. The result is a setup that suits both the fish and the aquascape.\u003c\/p\u003e\n\n\u003ch3\u003eLighting Requirements\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is best. Very bright, unshaded lighting can wash out colours and make the fish nervous. Use floating plants or hardscape shadows to break up intensity, and keep the photoperiod around 6-8 hours if algae is a concern. In balanced planted tanks, 8-9 hours is usually fine.\u003c\/p\u003e\n\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eTank of 60 litres minimum, 75-90 litres preferred for larger schools\u003c\/li\u003e\n    \u003cli\u003eGroup of 6+, ideally 8-12\u003c\/li\u003e\n    \u003cli\u003eTemperature set to 24-26°C for best colour\u003c\/li\u003e\n    \u003cli\u003eSoft, slightly acidic water if possible\u003c\/li\u003e\n    \u003cli\u003eDark substrate, driftwood, leaf litter, and dense planting\u003c\/li\u003e\n    \u003cli\u003eGentle filtration and low to moderate flow\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 fish. Even hardy tetras can struggle in immature aquariums, and this species shows stress quickly through faded colour and tight schooling.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Hyphessobrycon margitae Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eIf you have been asking \u003cstrong\u003ewhat do ruby tetras eat\u003c\/strong\u003e, the answer is simple: a varied omnivorous diet built around small, high-quality foods. In nature they pick at tiny crustaceans, insect larvae, and organic matter. In captivity, the best \u003cstrong\u003eruby tetra food\u003c\/strong\u003e is a mix of fine flakes, micro pellets, frozen cyclops, daphnia, baby brine shrimp, and occasional live foods. A good \u003cstrong\u003ediamond flame tetra diet\u003c\/strong\u003e should focus on variety rather than one staple product.\u003c\/p\u003e\n\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eUse a quality fine flake or micro pellet as the base diet. This covers daily nutrition and is easy for the fish to take from the midwater zone. For fish in display tanks, a colour-supporting staple can help maintain the rich tones that make this species so attractive.\u003c\/p\u003e\n\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eFrozen cyclops, daphnia, and baby brine shrimp are excellent 3-4 times per week. These foods improve body condition, stimulate natural hunting behaviour, and are especially useful before breeding attempts. If you are following a \u003cstrong\u003ediamond flame tetra feeding guide\u003c\/strong\u003e, this is where the fish really benefits from variety.\u003c\/p\u003e\n\n\u003ch3\u003eTreats and Conditioning Foods\u003c\/h3\u003e\n\u003cp\u003eFor conditioning adults, small live foods such as microworms or newly hatched brine shrimp can be very effective. These are useful if you are researching \u003cstrong\u003ehyphessobrycon margitae breeding\u003c\/strong\u003e or \u003cstrong\u003ehow to breed ruby tetra\u003c\/strong\u003e. Keep portions small and remove leftovers promptly.\u003c\/p\u003e\n\u003cp\u003eCommon customer questions include \u003cstrong\u003edo ruby tetras eat shrimp\u003c\/strong\u003e and \u003cstrong\u003ewill ruby tetras eat shrimp\u003c\/strong\u003e. Adults may pick off tiny shrimplets if they fit in the mouth, but they usually ignore adult dwarf shrimp in heavily planted tanks. Another question is \u003cstrong\u003ehow often to feed tetras\u003c\/strong\u003e; for this species, twice daily in small portions is ideal.\u003c\/p\u003e\n\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 flake or micro pellet\u003c\/td\u003e\n\u003ctd\u003eWhat the group finishes in 30-60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFrozen daphnia, cyclops, or baby brine shrimp\u003c\/td\u003e\n\u003ctd\u003eSmall pinch or thawed portion with no leftovers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eQuestions such as \u003cstrong\u003ewhy is my tetra at the top of the tank\u003c\/strong\u003e or \u003cstrong\u003ewhy did tetra turn white\u003c\/strong\u003e are often linked to stress, poor oxygenation, or water quality rather than diet alone. Overfeeding is a common cause because it drives ammonia upward and lowers water quality. If fish are hanging near the surface, test water immediately and check aeration.\u003c\/p\u003e\n\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/collections\/fish-food\"\u003eMicro pellet and fine flake fish foods\u003c\/a\u003e — Ideal staple choices for small tetras that feed in the middle of the water column.\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/collections\/frozen-fish-food\"\u003eFrozen daphnia and baby brine shrimp\u003c\/a\u003e — Excellent for conditioning, colour support, and breeding preparation.\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 stressed fish. Feed little and often, and remove uneaten food quickly. Tiny tetras need small meals, not large ones.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eHyphessobrycon margitae Appearance: Colors, Patterns \u0026amp; Varieties\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e is a slim, laterally compressed tetra with a graceful midwater profile and an adult length of around 4 cm. The \u003cstrong\u003eruby tetra full size\u003c\/strong\u003e is modest, but the visual effect is striking: a red to orange body wash, blue metallic highlights, and reflective scaling that changes with angle and lighting. This is why some hobbyists compare it to a \u003cstrong\u003ebleeding blue tetra\u003c\/strong\u003e, \u003cstrong\u003eruby red tetra\u003c\/strong\u003e, or \u003cstrong\u003eblue emperor tetra super blue\u003c\/strong\u003e style fish.\u003c\/p\u003e\n\u003cp\u003eMales are usually slimmer and more intensely coloured, especially when mature and competing gently within a school. A \u003cstrong\u003eruby tetra female\u003c\/strong\u003e or \u003cstrong\u003ehyphessobrycon margitae female\u003c\/strong\u003e is typically a little rounder through the belly and slightly less vivid, particularly when carrying eggs. If you are trying to tell \u003cstrong\u003eruby tetra male vs female\u003c\/strong\u003e or \u003cstrong\u003ehyphessobrycon margitae male or female\u003c\/strong\u003e, body depth and colour intensity are the best clues.\u003c\/p\u003e\n\u003cp\u003eSearches for \u003cstrong\u003eruby tetra max size\u003c\/strong\u003e, \u003cstrong\u003epurple emperor tetra size\u003c\/strong\u003e, and \u003cstrong\u003eemperor tetra school size\u003c\/strong\u003e often come from aquarists comparing small display fish. This species remains smaller and more delicate-looking than emperor tetras, making it better for refined planted aquariums. It is also distinct from fish sold under names like \u003cstrong\u003eblack ruby tetra\u003c\/strong\u003e or \u003cstrong\u003eruby red nose tetra\u003c\/strong\u003e, which are different species entirely.\u003c\/p\u003e\n\u003cp\u003eOur photos show the best colour when fish are kept over dark substrate, under moderate lighting, and fed a varied diet. In bright bare tanks, even healthy specimens can look washed out. In shaded planted tanks, the blue flash becomes far more obvious and the red body tone deepens noticeably.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Hyphessobrycon margitae? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eThis species is one of the \u003cstrong\u003ebest rare tetra for community tank\u003c\/strong\u003e setups if you choose companions carefully. The answer to \u003cstrong\u003eare ruby tetras aggressive\u003c\/strong\u003e is generally no; they are peaceful, though males may posture lightly within the group. The same applies to the common question \u003cstrong\u003eare emperor tetras aggressive\u003c\/strong\u003e: some emperor-type fish can be more assertive than \u003cem\u003eH. margitae\u003c\/em\u003e, which is why tank mate selection matters.\u003c\/p\u003e\n\u003cp\u003eA proper \u003cstrong\u003eHyphessobrycon margitae community tank\u003c\/strong\u003e should include similarly sized, non-fin-nipping fish that enjoy soft to neutral water. This makes the species ideal for a calm \u003cstrong\u003ecommunity tetra UK\u003c\/strong\u003e setup or a mixed \u003cstrong\u003eschooling fish UK\u003c\/strong\u003e display. If you want a \u003cstrong\u003ered blue oeru tetra for community tank\u003c\/strong\u003e, think peaceful rasboras, pencilfish, dwarf corydoras, small loricariids, and gentle tetras.\u003c\/p\u003e\n\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eGood companions include small bottom dwellers and other calm midwater fish. For a species-only group, you can start with \u003ca href=\"\/products\/hyphessobrycon-margitae\"\u003e6 x Hyphessobrycon margitae\u003c\/a\u003e and expand the school as the tank matures. In mixed communities, pair them with fish from our \u003ca href=\"\/collections\/south-american-tetra\"\u003eSouth American tetra collection\u003c\/a\u003e, plus peaceful catfish and invertebrates.\u003c\/p\u003e\n\u003cp\u003eSuitable options include \u003ca href=\"\/collections\/corydoras-catfish\"\u003eCorydoras catfish\u003c\/a\u003e for the bottom zone, \u003ca href=\"\/collections\/otocinclus\"\u003eOtocinclus algae eaters\u003c\/a\u003e for soft-water planted tanks, \u003ca href=\"\/collections\/pencilfish\"\u003epencilfish species\u003c\/a\u003e for the upper levels, and \u003ca href=\"\/collections\/dwarf-cichlids\"\u003egentle dwarf cichlids\u003c\/a\u003e only in larger, well-structured aquariums. If you prefer a tetra-focused display, compare \u003cstrong\u003eHyphessobrycon margitae tank mates\u003c\/strong\u003e with species of similar size and temperament rather than larger active characins.\u003c\/p\u003e\n\n\u003ch3\u003eSpecies to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid boisterous barbs, large cichlids, and predatory fish. One common customer search is \u003cstrong\u003ewill blue acara eat tetras\u003c\/strong\u003e; with adult blue acaras, the answer is often yes or at least maybe, especially with a small 4 cm tetra. Large angelfish, adult gouramis with territorial tendencies, and fin-nipping tank mates can also stress them.\u003c\/p\u003e\n\u003cp\u003eAnother common question is \u003cstrong\u003ecan you keep a single tetra\u003c\/strong\u003e. No, not if you want normal behaviour. This is a schooling species and should be kept in groups of at least 6, with 8-12 strongly preferred. A lone fish will often hide, fade, and become nervous.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility with Shrimp and Snails\u003c\/h3\u003e\n\u003cp\u003eAdult cherry shrimp and Amano shrimp are usually safe in heavily planted tanks, though shrimplets may be eaten. Snails are generally ignored. If you are keeping a shrimp colony, provide moss and dense cover to protect young shrimp.\u003c\/p\u003e\n\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\/hyphessobrycon-margitae\"\u003eHyphessobrycon margitae\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003eBest kept in a group of its own kind for confidence and colour\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003ca href=\"\/collections\/corydoras-catfish\"\u003eCorydoras catfish\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003ePeaceful bottom dwellers that suit similar water conditions\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBlue Acara\u003c\/td\u003e\n      \u003ctd\u003e❌ Avoid\u003c\/td\u003e\n      \u003ctd\u003eToo large and may view small tetras as food\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFor aquarists searching for a \u003cstrong\u003etetra fish compatibility chart\u003c\/strong\u003e, the key rule is simple: choose peaceful fish with similar water needs and avoid anything large enough to swallow them. This species is a textbook \u003cstrong\u003epeaceful rare schooling fish\u003c\/strong\u003e and one of the better choices if you want to \u003cstrong\u003ebuy rare tetra UK\u003c\/strong\u003e stock for a planted display.\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 a display tank. Small tetras can carry parasites without obvious early symptoms, and prevention is much easier than treating a full community aquarium.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow to Breed Hyphessobrycon margitae: Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHyphessobrycon margitae breeding\u003c\/strong\u003e is possible in home aquariums, but it is best described as moderate rather than easy. If you have read about \u003cstrong\u003ered blue oeru tetra breeding\u003c\/strong\u003e or \u003cstrong\u003ebreeding emperor tetras\u003c\/strong\u003e, the broad method is similar: condition adults well, use soft acidic water, and protect the eggs from hungry parents. This species is an egg scatterer, and adults will eat eggs if given the chance.\u003c\/p\u003e\n\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eUse a separate 20-30 litre breeding tank with dim light, very soft water, a pH around 5.5-6.5, and a temperature near the upper end of the normal range, around 26-27°C. Fine-leaved plants or spawning mops help catch eggs, and a mesh or marbles on the base can keep adults from reaching them. This is the most reliable answer to \u003cstrong\u003ehow to breed ruby tetra\u003c\/strong\u003e in a home setup.\u003c\/p\u003e\n\n\u003ch3\u003eConditioning and Spawning\u003c\/h3\u003e\n\u003cp\u003eCondition males and females on live or frozen foods for 1-2 weeks. A fuller-bodied \u003cstrong\u003ehyphessobrycon margitae female\u003c\/strong\u003e or \u003cstrong\u003eruby tetra female\u003c\/strong\u003e is usually ready to spawn when the belly rounds slightly. Introduce a pair or small group in the evening and check for eggs the next morning. If you are wondering \u003cstrong\u003ehow long does it take for tetra to lay eggs\u003c\/strong\u003e, spawning often happens at first light once fish are conditioned and settled.\u003c\/p\u003e\n\u003cp\u003eThe eggs are tiny and adhesive. Remove adults after spawning, because they do not provide parental care. Hobbyists searching for \u003cstrong\u003eruby tetra eggs\u003c\/strong\u003e should expect a small scatter among plants or mops rather than a nest.\u003c\/p\u003e\n\n\u003ch3\u003eEgg Care and Hatching\u003c\/h3\u003e\n\u003cp\u003eKeep the tank dim because eggs and fry can be light-sensitive. Depending on temperature, eggs usually hatch in about 24-36 hours, and fry become free-swimming a few days later. Gentle aeration and excellent hygiene are important, but avoid strong current.\u003c\/p\u003e\n\n\u003ch3\u003eFry Care and Growth\u003c\/h3\u003e\n\u003cp\u003eFeed infusoria or commercial fry food at first, then move onto microworms and newly hatched brine shrimp. If you are asking \u003cstrong\u003ehow fast do tetras grow\u003c\/strong\u003e, growth is steady rather than rapid; good feeding frequency and clean water matter more than trying to push growth. The species reaches saleable juvenile size well before adulthood, but full colour takes longer.\u003c\/p\u003e\n\u003cp\u003eFor those researching \u003cstrong\u003ediamond flame tetra lifespan\u003c\/strong\u003e, good breeding stock should remain productive for multiple seasons if maintained well. As with many characins, the biggest challenge is not getting eggs but raising enough fry past the first delicate weeks.\u003c\/p\u003e\n\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse reverse osmosis water remineralised very lightly if your tap water is hard. Many breeders see better hatch rates and fewer fungal losses when conductivity is kept low and the breeding tank is heavily shaded.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eHyphessobrycon margitae vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eSmall red and blue characins are often sold under confusing trade names, so comparison matters. Shoppers may search for \u003cstrong\u003eHyphessobrycon margitae vs ember tetra\u003c\/strong\u003e, \u003cstrong\u003ediamond flame tetra vs cardinal tetra\u003c\/strong\u003e, or \u003cstrong\u003ediamond flame tetra vs flame tetra\u003c\/strong\u003e when deciding which fish best suits a planted aquarium. \u003cem\u003eH. margitae\u003c\/em\u003e sits in the middle ground: subtler than a cardinal, more unusual than an ember, and more refined than many common flame-type tetras.\u003c\/p\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eHyphessobrycon margitae\u003c\/th\u003e\n\u003cth\u003eEmber 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\u003e4 cm\u003c\/td\u003e\n\u003ctd\u003e2-2.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eModerate\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\u003e24-28°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£14.52\u003c\/td\u003e\n\u003ctd\u003eVaries by stock\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eRare planted displays\u003c\/td\u003e\n\u003ctd\u003eNano community tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eHyphessobrycon margitae\u003c\/th\u003e\n\u003cth\u003eCardinal Tetra\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eColour Style\u003c\/td\u003e\n\u003ctd\u003eRuby-red with blue sheen\u003c\/td\u003e\n\u003ctd\u003eBold neon blue and red stripe\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperament\u003c\/td\u003e\n\u003ctd\u003ePeaceful, slightly shy at first\u003c\/td\u003e\n\u003ctd\u003ePeaceful, active schooler\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWater Preference\u003c\/td\u003e\n\u003ctd\u003eSoft, acidic to neutral\u003c\/td\u003e\n\u003ctd\u003eSoft, acidic preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRarity in UK\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003ctd\u003eCommon\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eCollectors of rare tetra species UK\u003c\/td\u003e\n\u003ctd\u003eClassic community aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eIf you want something uncommon, elegant, and especially effective in a blackwater aquascape, choose \u003cem\u003eH. margitae\u003c\/em\u003e. If you want a widely available beginner fish, ember or cardinal tetras may be easier to source. Searches such as \u003cstrong\u003esuper blue emperor tetra\u003c\/strong\u003e, \u003cstrong\u003esuper blue emperor tetra inpaichthys kerri\u003c\/strong\u003e, or \u003cstrong\u003einpaichthys kerri blue emperor tetra super blue\u003c\/strong\u003e refer to a different fish entirely, with a cooler overall look and different body shape. Likewise, names such as \u003cstrong\u003eaxelrodia riesei ruby tetra\u003c\/strong\u003e can refer to other ruby-type tetras, so scientific names matter when comparing.\u003c\/p\u003e\n\u003cp\u003eSome hobbyists also ask about \u003cstrong\u003ehyphessobrycon procyon\u003c\/strong\u003e, \u003cstrong\u003ehyphessobrycon peruvianus\u003c\/strong\u003e, \u003cstrong\u003ehyphessobrycon loretoensis\u003c\/strong\u003e, or \u003cstrong\u003ehyphessobrycon negodagua\u003c\/strong\u003e. These are separate species and should not be treated as direct synonyms. If your goal is a rare Peruvian display fish with red-blue contrast, \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e is the species to target.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Hyphessobrycon margitae \u0026amp; How to Prevent Them\u003c\/h2\u003e\n\u003cp\u003eA healthy \u003cstrong\u003eruby tetra\u003c\/strong\u003e is alert, evenly coloured, feeding eagerly, and schooling without clamped fins. If you are wondering \u003cstrong\u003eare ruby tetra hardy\u003c\/strong\u003e or \u003cstrong\u003ehow hardy are tetras\u003c\/strong\u003e, the answer is that this species is reasonably robust once established, but it dislikes sudden swings in water chemistry and poor acclimation. It is not fragile, but it is not a fish for neglected tanks either.\u003c\/p\u003e\n\n\u003ch3\u003eSigns of a Healthy Fish\u003c\/h3\u003e\n\u003cp\u003eLook for clear eyes, smooth breathing, intact fins, and a willingness to feed. In a settled group, mild sparring between males is normal, but relentless chasing is not. New arrivals may be a little subdued for a few days, which is why some people ask \u003cstrong\u003eare ruby tetras shy\u003c\/strong\u003e. They can be shy at first, especially in small groups or bright tanks, but they usually settle well.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Problems\u003c\/h3\u003e\n\u003cp\u003eThe main risks are stress-related fading, fin damage from unsuitable tank mates, and common tetra ailments such as ich, bacterial infections, or wasting linked to poor water quality. Questions like \u003cstrong\u003ewhy did tetra turn white\u003c\/strong\u003e often point to stress, disease, or ammonia exposure. Surface-hanging behaviour behind the question \u003cstrong\u003ewhy is my tetra at the top of the tank\u003c\/strong\u003e usually suggests oxygen or water-quality trouble.\u003c\/p\u003e\n\n\u003ch3\u003eTreatment and Prevention\u003c\/h3\u003e\n\u003cp\u003ePrevention is built on stable water, regular weekly changes of 20-30%, varied feeding, and proper quarantine. Use a separate hospital tank if treatment is needed. If invertebrates are present, read medication labels carefully because many treatments are not shrimp-safe.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Health Warning\u003c\/h4\u003e\n  \u003cp\u003eNEVER use copper-based medications in aquariums containing shrimp or other sensitive invertebrates. Copper can be lethal even at low doses.\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\u003eIsolate new fish for 2-4 weeks in a separate tank\u003c\/li\u003e\n    \u003cli\u003eObserve feeding response, respiration, and faeces daily\u003c\/li\u003e\n    \u003cli\u003eMaintain stable heat and excellent water quality\u003c\/li\u003e\n    \u003cli\u003eOnly move fish to the display tank once they are active and symptom-free\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor aquarists browsing \u003cstrong\u003etropical tetra fish UK\u003c\/strong\u003e or \u003cstrong\u003erare tropical fish UK\u003c\/strong\u003e listings, this species rewards consistency. Most health issues we see are not species-specific; they come from rushed cycling, overstocking, or mixing them with unsuitable fish.\u003c\/p\u003e\n\n\u003ch2 id=\"behavior\"\u003eUnderstanding Hyphessobrycon margitae Behavior in the Aquarium\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e is an active but refined midwater schooler. It is not hyperactive like some larger tetras, and it is not solitary. The fish spends much of the day weaving through open spaces between plants, pausing under cover, then regrouping in loose formation. In the right group size, it becomes one of the most attractive examples of a \u003cstrong\u003epeaceful rare schooling fish\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIf you are asking whether this species behaves like emperor tetras, the answer is partly. Males may posture and display, but serious aggression is uncommon in a spacious planted tank. A proper \u003cstrong\u003ediamond flame tetra behaviour\u003c\/strong\u003e pattern includes short dashes, subtle dominance displays, and stronger colour during feeding or courtship.\u003c\/p\u003e\n\u003cp\u003eTo encourage natural behaviour, keep at least 6 fish, preferably more, and provide visual barriers with plants and wood. This also answers the common concern over \u003cstrong\u003etetra requirements\u003c\/strong\u003e: group size, stable water, and cover matter just as much as temperature or pH. In sparse tanks they may hide; in mature planted aquariums they show far more confidence.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWhen you order \u003cstrong\u003eHyphessobrycon margitae for sale UK\u003c\/strong\u003e stock, the difference is not just the species name on the label. This fish often arrives in the trade under mixed common names such as \u003cstrong\u003eRed Blue Peru Tetra\u003c\/strong\u003e, \u003cstrong\u003eDiamond Flame Tetra\u003c\/strong\u003e, or ruby-type tetra, so accurate identification matters. We list it clearly as \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e so you know exactly what you are buying.\u003c\/p\u003e\n\u003cp\u003eBefore dispatch, our fish are settled, observed, and feeding on prepared foods. That matters with rare characins because newly imported fish can be shy and washed out. We hold them long enough to confirm feeding response and basic stability, then pack them in insulated boxes with appropriate seasonal protection, including heat packs in winter. Tracked delivery and professional bagging help reduce transit stress.\u003c\/p\u003e\n\u003cp\u003eIf you are comparing \u003cstrong\u003ehyphessobrycon margitae price\u003c\/strong\u003e, \u003cstrong\u003eHyphessobrycon margitae price UK\u003c\/strong\u003e, \u003cstrong\u003eruby tetra price\u003c\/strong\u003e, or \u003cstrong\u003eruby fish price\u003c\/strong\u003e, remember that condition and identification are as important as the headline number. A correctly identified, feeding, well-settled group is worth more than anonymous “mixed tetra” stock. For collectors searching \u003cstrong\u003ehyphessobrycon margitae for sale\u003c\/strong\u003e, \u003cstrong\u003eruby tetra for sale\u003c\/strong\u003e, \u003cstrong\u003eruby tetra for sale uk\u003c\/strong\u003e, \u003cstrong\u003eruby tetra for sale near me\u003c\/strong\u003e, \u003cstrong\u003ebuy ruby tetra\u003c\/strong\u003e, \u003cstrong\u003ebuy red blue oeru tetra UK\u003c\/strong\u003e, \u003cstrong\u003ediamond flame tetra for sale UK\u003c\/strong\u003e, \u003cstrong\u003ered blue peru tetra for sale UK\u003c\/strong\u003e, or \u003cstrong\u003eoeru tetra buy online UK\u003c\/strong\u003e, confidence in the fish matters.\u003c\/p\u003e\n\u003cp\u003eOrder your \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e today if you want a rare, elegant tetra for a planted South American aquarium. It is a superb choice for aquarists who value subtle beauty, true schooling behaviour, and a fish that looks better the better you keep it.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Hyphessobrycon margitae\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eClearly identified \u003cem\u003eHyphessobrycon margitae\u003c\/em\u003e, not vague “ruby tetra” mixed stock\u003c\/li\u003e\n    \u003cli\u003eObserved for feeding response before dispatch, which is especially important for rare imported characins\u003c\/li\u003e\n    \u003cli\u003ePacked for UK transit with insulated materials and seasonal heat protection to reduce stress on arrival\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 complete soft-water display around this species with a few carefully chosen additions. Start with another group of \u003ca href=\"\/products\/hyphessobrycon-margitae\"\u003eHyphessobrycon margitae\u003c\/a\u003e so your school reaches display size quickly. Add support species from our \u003ca href=\"\/collections\/corydoras-catfish\"\u003eCorydoras range\u003c\/a\u003e or browse peaceful midwater companions in the \u003ca href=\"\/collections\/south-american-tetra\"\u003eSouth American tetra collection\u003c\/a\u003e. For aquascaping, pair them with items from our \u003ca href=\"\/collections\/live-aquarium-plants\"\u003elive aquarium plants collection\u003c\/a\u003e, a dependable \u003ca href=\"\/collections\/aquarium-heaters\"\u003eaquarium heater\u003c\/a\u003e, and a gentle \u003ca href=\"\/collections\/aquarium-filters\"\u003eplanted tank filter\u003c\/a\u003e. To keep colour and condition at their best, use foods from our \u003ca href=\"\/collections\/fish-food\"\u003esmall fish food range\u003c\/a\u003e and supplement with \u003ca href=\"\/collections\/frozen-fish-food\"\u003efrozen fish foods\u003c\/a\u003e.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"2.5-3 cm","offer_id":57379801465167,"sku":"2461","price":17.99,"currency_code":"GBP","in_stock":false},{"title":"3-4 cm","offer_id":57560361795919,"sku":"2462","price":5.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/hyphessobrycon-sp-red-blue-peru-natural-aquarium-2461.webp?v=1777850397","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/ruby-tetra-super-blue-emperor-diamond-flame-red-peru-hyphessobrycon-margitae","provider":"Tropical Fish Co","version":"1.0","type":"link"}