{"product_id":"tropical-fish-uk-for-sale-buy-live-online-pseudomugil-gertrudae","title":"Spotted Blue-Eye Rainbowfish (Pseudomugil gertrudae) - UK","description":"\u003cp\u003e\u003cstrong\u003eSpotted Blue-Eye Rainbowfish - \u003cem\u003ePseudomugil gertrudae\u003c\/em\u003e\u003c\/strong\u003e is one of the most charming \u003cstrong\u003etropical fish UK\u003c\/strong\u003e aquarists can keep if they want a small, peaceful, and genuinely eye-catching species. This tiny rainbowfish from northern Australia and Papua New Guinea brings constant movement, flashing fins, and subtle metallic colour into a home aquarium without needing a huge footprint. Adults reach around \u003cstrong\u003e4 cm\u003c\/strong\u003e, live for about \u003cstrong\u003e3 years\u003c\/strong\u003e, and are best described as \u003cstrong\u003emoderate care\u003c\/strong\u003e fish: not difficult, but they do reward good husbandry, stable water, and a well-planted layout. If you are searching for \u003cstrong\u003eaquarium rainbowfish UK\u003c\/strong\u003e options that work in a community setting, this species is a standout choice for a \u003cstrong\u003eplanted tank\u003c\/strong\u003e, a calm nano setup, or a carefully planned \u003cstrong\u003ecommunity tropical fish UK\u003c\/strong\u003e display. See our detailed photos showing the delicate finnage, spotted patterning, and the bright contrast that makes \u003cstrong\u003eSpotted Blue-Eye Rainbowfish\u003c\/strong\u003e so popular with hobbyists looking for \u003cstrong\u003ecolourful tropical fish UK\u003c\/strong\u003e stock. Whether you are comparing \u003cstrong\u003ebest rainbowfish for community tank\u003c\/strong\u003e options, checking \u003cstrong\u003espotted blue-eye rainbowfish tank size\u003c\/strong\u003e, or researching \u003cstrong\u003epseudomugil gertrudae care\u003c\/strong\u003e, this guide covers the essentials in plain English so you can set up the right home from day one.\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\u003ePseudomugil gertrudae\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 40 litres (11 gallons)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 24-28°C (75-82°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 3 years\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperament:\u003c\/strong\u003e Peaceful, active schooling fish\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiet:\u003c\/strong\u003e Omnivore - micro foods, frozen daphnia, small live foods\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 Atheriniformes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFamily:\u003c\/strong\u003e Pseudomugilidae\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenus:\u003c\/strong\u003e Pseudomugil\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThe spotted blue-eye is a small freshwater rainbowfish relative that has become a favourite in the aquarium hobby because it combines beauty with a manageable size. It sits alongside other \u003cstrong\u003efreshwater rainbowfish UK\u003c\/strong\u003e favourites such as threadfins, forktailed blue-eyes, and dwarf rainbowfish. In the trade you may also see it listed as \u003cstrong\u003edelicate blue-eye\u003c\/strong\u003e, \u003cstrong\u003eGertrude's blue-eye\u003c\/strong\u003e, or \u003cstrong\u003enorthern blue-eye\u003c\/strong\u003e. Hobbyists often choose it when they want a fish that looks special but still suits a modest home aquarium rather than a large show tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Spotted Blue-Eye Rainbowfish Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSpotted blue-eye rainbowfish habitat\u003c\/strong\u003e comes from shallow, slow-moving freshwater environments in \u003cstrong\u003enorthern Australia\u003c\/strong\u003e, \u003cstrong\u003ePapua New Guinea\u003c\/strong\u003e, and parts of \u003cstrong\u003eIndonesia\u003c\/strong\u003e. In the wild, these fish are usually found in vegetated creeks, swampy margins, lagoons, and quiet backwaters where roots, leaf litter, and dense plant cover provide shelter. That natural setting explains why \u003cstrong\u003espotted blue-eye rainbowfish in planted tank\u003c\/strong\u003e setups work so well: they feel secure when they can weave through stems and hover near cover. Their wild environment is typically warm, soft to moderately hard, and gently acidic to neutral, which is why \u003cstrong\u003espotted blue-eye rainbowfish water parameters\u003c\/strong\u003e matter so much in captivity. They are not a fish for harsh, unstable water or strong flow.\u003c\/p\u003e\n\u003cp\u003eIn a \u003cstrong\u003epseudomugil gertrudae biotope\u003c\/strong\u003e, the fish would encounter fine roots, submerged grasses, and a constant supply of tiny invertebrates and micro foods. That is why a varied diet in captivity helps maintain colour and condition. Their natural diet is small prey, algae films, and drifting organisms, which also makes them useful as \u003cstrong\u003ealgae eating tropical fish uk\u003c\/strong\u003e companions in a balanced aquarium, though they should not be relied on as a true algae-control fish. They are peaceful, quick, and slightly nervous in open spaces, so the best results come from a heavily planted aquascape with shaded areas and calm tankmates. If you are searching for \u003cstrong\u003ewild tropical fish uk\u003c\/strong\u003e inspiration or planning a natural-style display, this species fits beautifully into a soft-water community with leaf litter and fine-leaved plants.\u003c\/p\u003e\n\u003cp\u003eConservation status can vary by population, and local habitat changes matter, so sensible sourcing is important. In the hobby, captive-bred fish are preferred whenever possible because they adapt better to \u003cstrong\u003etropical fish care in uk\u003c\/strong\u003e conditions and usually settle faster after transport. A customer who recently added a group to a 60-litre planted tank reported that the fish stopped hiding within two days once floating plants and dim lighting were added. That is the kind of response you can expect when the aquarium matches the species’ natural rhythm.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimic the natural habitat with fine plants, dark substrate, and gentle filtration. Spotted blue-eyes show better colour, stronger feeding response, and more confident \u003cstrong\u003espotted blue-eye rainbowfish behaviour\u003c\/strong\u003e when they feel sheltered.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow to Set Up the Perfect Tank for Spotted Blue-Eye Rainbowfish?\u003c\/h2\u003e\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003espotted blue-eye rainbowfish minimum tank size\u003c\/strong\u003e is 40 litres, but that is only suitable for a small group in a carefully maintained setup. For the best long-term results, 60 litres or more is preferable, especially if you want a proper shoal and room for plants, open swimming space, and stable water quality. Because these fish are active and should be kept in groups of \u003cstrong\u003e8+ (schooling)\u003c\/strong\u003e, a larger tank reduces stress and helps spread the bioload. If you are using an \u003cstrong\u003eaquarium fish calculator uk\u003c\/strong\u003e to plan stocking, remember that these fish are small but still need space for social behaviour. A larger aquarium also makes it easier to maintain the \u003cstrong\u003espotted blue-eye rainbowfish ideal conditions\u003c\/strong\u003e without sudden swings.\u003c\/p\u003e\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eFor \u003cstrong\u003espotted blue-eye rainbowfish temperature\u003c\/strong\u003e, aim for \u003cstrong\u003e24-28°C\u003c\/strong\u003e, with 25-26°C often being the sweet spot for everyday maintenance. This also matches common \u003cstrong\u003etropical fish tank temperature uk\u003c\/strong\u003e guidance and sits comfortably within \u003cstrong\u003etropical fish tank temperature uk celsius\u003c\/strong\u003e ranges used by most home aquarists. The species prefers a pH of \u003cstrong\u003e6.0-7.5\u003c\/strong\u003e and water hardness of roughly \u003cstrong\u003e5-15 dGH\u003c\/strong\u003e. If you are comparing \u003cstrong\u003espotted blue-eye rainbowfish water temperature\u003c\/strong\u003e to other rainbowfish, they are slightly more forgiving than some delicate species, but they still dislike extremes. Stable \u003cstrong\u003espotted blue-eye rainbowfish water hardness\u003c\/strong\u003e and clean, oxygen-rich water are more important than chasing a perfect number on paper. Many UK homes run cooler than tropical standards, so a reliable heater is essential for \u003cstrong\u003etropical fish water temperature uk\u003c\/strong\u003e consistency.\u003c\/p\u003e\n\u003ch3\u003eFiltration\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSpotted blue-eye rainbowfish filtration needs\u003c\/strong\u003e are moderate but non-negotiable. They do best with a mature sponge filter, small internal filter, or gentle hang-on-back unit that provides biological filtration without blasting their fins. Strong currents can make them hide, while weak filtration can quickly lead to poor water quality. If you are wondering \u003cstrong\u003ecan tropical fish live without a filter\u003c\/strong\u003e, the answer for this species is no, not in a healthy long-term setup. You may also ask \u003cstrong\u003ehow long can tropical fish live without a filter\u003c\/strong\u003e; for spotted blue-eyes, the safe answer is not long at all, because they are sensitive to ammonia and nitrite. Keep the flow soft, oxygenation high, and maintenance regular.\u003c\/p\u003e\n\u003ch3\u003eSubstrate, Plants, and Decor\u003c\/h3\u003e\n\u003cp\u003eFine dark sand or smooth gravel works well, especially when paired with driftwood, leaf litter, and dense planting. In a \u003cstrong\u003espotted blue-eye rainbowfish aquarium setup\u003c\/strong\u003e, use background plants such as Vallisneria, stem plants, Java moss, and floating cover to create layers of security. A \u003cstrong\u003espotted blue-eye rainbowfish tank setup\u003c\/strong\u003e looks best when the front has open swimming space but the sides and back are heavily planted. This species also excels in a \u003cstrong\u003espotted blue-eye rainbowfish in planted tank\u003c\/strong\u003e layout with subdued lighting and natural hardscape. For equipment and aquascaping, consider pairing the tank with a dependable \u003ca href=\"\/products\/tropical-fish-uk\"\u003eaquarium heater for tropical fish UK\u003c\/a\u003e, a quiet \u003ca href=\"\/products\/tropical-fish-uk\"\u003esponge filter for nano aquariums\u003c\/a\u003e, and a natural-looking \u003ca href=\"\/products\/tropical-fish-uk\"\u003edark aquarium substrate\u003c\/a\u003e. Add floating plants such as Salvinia or Amazon frogbit to soften the light and encourage natural courtship displays.\u003c\/p\u003e\n\u003ch3\u003eLighting Requirements\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is ideal. Too much light without cover can make them skittish, while dim, plant-friendly lighting helps their spots and fin markings stand out. A 6-8 hour photoperiod is a sensible starting point. If you are setting up a new tank, cycle it for 4-6 weeks before adding fish, and test ammonia, nitrite, and nitrate regularly. That advice matters for anyone asking \u003cstrong\u003ewhat is a good size fish tank for a beginner\u003c\/strong\u003e or \u003cstrong\u003ewhat size fish should i get\u003c\/strong\u003e when they want a small, attractive community fish. For many first-time keepers, this species is a better answer than larger rainbowfish because it is manageable, peaceful, and visually rewarding.\u003c\/p\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e40 litres minimum; 60 litres preferred for a group\u003c\/li\u003e\n    \u003cli\u003eHeater set to 25-26°C\u003c\/li\u003e\n    \u003cli\u003eGentle filtration with mature biological media\u003c\/li\u003e\n    \u003cli\u003eDense plants, floating cover, and shaded areas\u003c\/li\u003e\n    \u003cli\u003eSoft to moderately hard water, pH 6.0-7.5\u003c\/li\u003e\n    \u003cli\u003eFully cycled tank before fish are added\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 aquarium for 4-6 weeks before stocking. A stable nitrogen cycle is the single biggest factor in keeping \u003cstrong\u003espotted blue-eye rainbowfish health\u003c\/strong\u003e strong and reducing stress-related disease.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Spotted Blue-Eye Rainbowfish Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003espotted blue-eye rainbowfish diet\u003c\/strong\u003e is naturally varied, and that should be mirrored in captivity. They are omnivores that take micro foods, tiny crustaceans, insect larvae, and algae films in the wild. In the aquarium, the \u003cstrong\u003espotted blue-eye rainbowfish feeding guide\u003c\/strong\u003e should focus on high-quality small foods that fit their tiny mouths. Good staples include micro pellets, crushed flakes, frozen daphnia, baby brine shrimp, and finely chopped live foods. If you are looking for the \u003cstrong\u003ebest tropical fish food uk\u003c\/strong\u003e options, choose foods designed for small tropical species rather than large community fish.\u003c\/p\u003e\n\u003cp\u003eFor daily staples, many keepers use \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British tropical fish flake food\u003c\/a\u003e or \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British tropical fish mini pellets\u003c\/a\u003e because they are easy to portion and widely available in the UK. A quality \u003ca href=\"\/products\/tropical-fish-uk\"\u003etropical fish food UK\u003c\/a\u003e mix should be supplemented with frozen and live foods to support colour, condition, and breeding readiness. If you buy online, you may see searches for \u003cstrong\u003eamazon uk tropical fish food\u003c\/strong\u003e or \u003cstrong\u003etropical fish food amazon uk\u003c\/strong\u003e, but the real priority is protein size, freshness, and ingredient quality. Some aquarists also keep \u003cstrong\u003elive tropical fish food uk\u003c\/strong\u003e such as daphnia or brine shrimp for conditioning adults before breeding.\u003c\/p\u003e\n\u003cp\u003eFeed small amounts once or twice a day. That answers common questions like \u003cstrong\u003ehow often should you feed tropical fish\u003c\/strong\u003e, \u003cstrong\u003eshould you feed tropical fish every day\u003c\/strong\u003e, and \u003cstrong\u003ehow many times a week do you feed tropical fish\u003c\/strong\u003e. For this species, a tiny portion in the morning and another in the evening is usually ideal, but only if the fish clear the food quickly. If you are asking \u003cstrong\u003ehow long can small tropical fish go without food\u003c\/strong\u003e, healthy adults can usually manage a short fast, but regular feeding is better for growth and colour. Use an \u003ca href=\"\/products\/tropical-fish-uk\"\u003eautomatic tropical fish feeder UK\u003c\/a\u003e only if you are away briefly and the tank is stable; it should not replace proper observation.\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\u003eMicro pellets or crushed flake\u003c\/td\u003e\n\u003ctd\u003eSmall pinch, fully eaten in 30-60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFrozen daphnia, baby brine shrimp, or live food\u003c\/td\u003e\n\u003ctd\u003eSmall portion, no leftovers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFoods to avoid include large sinking wafers, oversized pellets, and anything that quickly breaks down into waste. Overfeeding is the most common mistake, especially in small aquariums. If you want to compare shopping options, people often search for \u003cstrong\u003etropical fish food ebay uk\u003c\/strong\u003e or \u003cstrong\u003etropical fish food uk\u003c\/strong\u003e, but whichever brand you choose, portion control matters more than packaging. A balanced diet also supports spawning success and better fin display.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Overfeeding causes ammonia spikes and water quality issues\u003c\/h4\u003e\n  \u003cp\u003eSpotted blue-eyes are tiny fish with tiny stomachs. Feed only what they can finish quickly, remove leftovers, and keep nitrate low to protect appetite, colour, and long-term \u003cstrong\u003espotted blue-eye rainbowfish health\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British Tropical Fish Flake Food\u003c\/a\u003e - A dependable staple for daily feeding in small community tanks.\n\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British Tropical Fish Mini Pellets\u003c\/a\u003e - Ideal for tiny mouths and easy portion control in planted aquariums.\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Does a Spotted Blue-Eye Rainbowfish Look Like?\u003c\/h2\u003e\n\u003cp\u003eAdult \u003cstrong\u003eSpotted Blue-Eye Rainbowfish\u003c\/strong\u003e are petite, elegant fish with an elongated body, transparent to pale silver-white base colour, and distinctive black spotting and striping across the rear half of the body. Males often show stronger fin extension and more intense colour, while females are usually a little rounder and less dramatic in the fins. This makes \u003cstrong\u003espotted blue-eye rainbowfish male vs female\u003c\/strong\u003e identification fairly straightforward once the fish mature. The fins are typically yellow with black markings, and in good light the fish can flash subtle blue, gold, and silver tones that make them look much brighter than their size suggests.\u003c\/p\u003e\n\u003cp\u003eAt around \u003cstrong\u003e4 cm\u003c\/strong\u003e, they are small enough for compact tanks but still lively enough to be the focal point of a planted display. If you are comparing \u003cstrong\u003espotted blue-eye rainbowfish vs neon rainbowfish\u003c\/strong\u003e or \u003cstrong\u003espotted blue-eye rainbowfish vs praecox rainbowfish\u003c\/strong\u003e, the key difference is scale and delicacy: spotted blue-eyes are smaller, more refined, and better suited to calm communities. They are also a strong choice if you want a fish that is less robust-looking than \u003cstrong\u003espotted blue-eye rainbowfish vs boesemani rainbowfish\u003c\/strong\u003e and more subtle than larger show species. Some hobbyists prefer them over threadfins because they are a little more active in the midwater zone, while others choose them for their fine markings and easy pairing with plants.\u003c\/p\u003e\n\u003cp\u003eOur photos show how the fish’s colour changes depending on lighting, substrate, and diet. Dark backgrounds and live foods often bring out the strongest contrast. In a well-run aquarium, the body can appear almost translucent, with the black spotting and bright fin edges standing out clearly. That visual contrast is one reason they are often recommended as \u003cstrong\u003espotted blue-eye rainbowfish for beginners\u003c\/strong\u003e who want something more unusual than common tetras but still manageable. They are also a good fit for aquarists seeking \u003cstrong\u003erare tropical fish uk\u003c\/strong\u003e options that remain practical in a home tank.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Spotted Blue-Eye Rainbowfish? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eThe spotted blue-eye is peaceful, quick, and social, which makes it an excellent fit for a carefully chosen community. The best \u003cstrong\u003espotted blue-eye rainbowfish tank mates\u003c\/strong\u003e are small, calm fish that will not outcompete them for food or intimidate them with aggression. Good companions include small rasboras, ember tetras, pygmy corydoras, otocinclus, and other gentle species that suit the same water range. If you are searching for \u003cstrong\u003espotted blue-eye rainbowfish compatible fish\u003c\/strong\u003e, think “small, peaceful, and not fin-nippy.” That is especially important in a tank where the fish need to feel secure to show natural colour and courtship behaviour.\u003c\/p\u003e\n\u003cp\u003eFor many aquarists, they are among the \u003cstrong\u003ebest rainbowfish species comparison\u003c\/strong\u003e winners for smaller community aquariums because they are less boisterous than larger rainbowfish. They work well in \u003cstrong\u003ecommunity tropical fish UK\u003c\/strong\u003e setups with soft water, live plants, and moderate stocking. If you are wondering \u003cstrong\u003ewhat tropical fish are aggressive\u003c\/strong\u003e, avoid cichlids, large barbs, and anything known for fin-nipping. A good rule is to choose tankmates that stay under 5 cm, prefer similar temperatures, and do not dominate the tank. They also do well \u003cstrong\u003ewith other fish\u003c\/strong\u003e when the group size is correct and the aquarium is not overcrowded.\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\"\u003eThreadfin Rainbowfish\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003eSimilar size and temperament; best in planted tanks with gentle flow.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003ePaska'S Blue-Eye\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003eGreat for a mixed blue-eye display if the tank is spacious enough.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eForktail Blue-Eye Rainbowfish\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003eCompatible in soft, planted aquariums with calm tankmates.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLarge barbs\u003c\/td\u003e\n      \u003ctd\u003e❌ Avoid\u003c\/td\u003e\n      \u003ctd\u003eToo boisterous and likely to stress or nip fins.\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor a 60-litre aquarium, a sensible community might include 8 spotted blue-eyes, 6 ember tetras, and 6 pygmy corydoras, provided filtration is mature and the tank is heavily planted. In a 90-litre tank, you can add a small otocinclus group once the aquarium is well established. If you are asking \u003cstrong\u003ehow many spotted blue-eye rainbowfish in a tank\u003c\/strong\u003e, remember that a larger group is better than a small pair. They are shoaling fish and become more confident when kept in numbers. Avoid mixing them with highly territorial fish, and do not assume that \u003cstrong\u003esnail eating tropical fish uk\u003c\/strong\u003e species are suitable just because they are small; many are still too rough for this fish.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Always quarantine new arrivals for 2-4 weeks\u003c\/h4\u003e\n  \u003cp\u003eQuarantine helps protect spotted blue-eyes from parasites, bacterial infections, and stress-related losses. It also gives you time to observe feeding, breathing, and fin condition before adding them to the main display.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow to Breed Spotted Blue-Eye Rainbowfish: Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSpotted blue-eye rainbowfish breeding\u003c\/strong\u003e is considered moderate, but it is very achievable once the fish are settled, well fed, and kept in excellent water. Breeding is one reason this species is popular with \u003cstrong\u003etropical fish breeders uk\u003c\/strong\u003e and \u003cstrong\u003euk tropical fish breeders\u003c\/strong\u003e who enjoy small egg-scattering species. The easiest way to start is with a group of young fish and allow a pair or small harem to form naturally. Males display to females with extended fins and brighter colour, so \u003cstrong\u003espotted blue-eye rainbowfish male vs female\u003c\/strong\u003e differences become more obvious during courtship.\u003c\/p\u003e\n\u003cp\u003eA breeding tank of 20-40 litres with fine-leaved plants, spawning mops, or moss is ideal. Slightly warmer water around 26-27°C and frequent small water changes can trigger spawning. The fish often lay adhesive eggs among plants or mops, and adults may eat eggs if given the chance, so remove the spawning material or separate the parents once eggs appear. The eggs usually hatch in about 10-14 days depending on temperature. Fry are tiny and need infusoria, green water, or commercial fry foods for the first stage, followed by newly hatched baby brine shrimp as they grow.\u003c\/p\u003e\n\u003cp\u003eIf you are looking for \u003cstrong\u003ebuy live fish online uk\u003c\/strong\u003e options to start a breeding project, choose healthy, well-conditioned fish from a reliable source rather than the cheapest listing. Searches such as \u003cstrong\u003ebuy tropical fish online uk free delivery\u003c\/strong\u003e, \u003cstrong\u003espotted blue-eye rainbowfish for sale UK\u003c\/strong\u003e, and \u003cstrong\u003elive spotted blue-eye rainbowfish UK\u003c\/strong\u003e are common, but breeding success starts with strong stock. Conditioning adults with \u003cstrong\u003ebest tropical fish food uk\u003c\/strong\u003e quality foods, especially live and frozen items, improves spawn frequency and egg quality. The species is also listed by some sellers as \u003cstrong\u003epseudomugil gertrudae ficha\u003c\/strong\u003e or \u003cstrong\u003epseudomugil paskai ficha\u003c\/strong\u003e in multilingual listings, so always check the scientific name carefully.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse a separate breeding tank with floating plants, a sponge filter, and a dark substrate. Feed conditioning foods for 10-14 days before spawning, then collect eggs daily to prevent predation and improve fry survival.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eSpotted Blue-Eye Rainbowfish vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eComparing species helps you choose the right fish for your tank size, water, and personality preferences. If you want a tiny rainbowfish that stays peaceful and looks best in a planted display, the spotted blue-eye is often the sweet spot. It is smaller and more delicate than many other \u003cstrong\u003erainbowfish for sale UK\u003c\/strong\u003e options, but it still delivers movement and colour. For aquarists searching \u003cstrong\u003ebuy rainbowfish UK\u003c\/strong\u003e or browsing \u003cstrong\u003elive rainbowfish UK\u003c\/strong\u003e stock, it is worth comparing it with similar blue-eyes before making a decision.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpotted Blue-Eye Rainbowfish\u003c\/th\u003e\n\u003cth\u003eThreadfin Rainbowfish\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\u003e4-5 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\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e24-28°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£11.61\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\u003ePlanted nano and community tanks\u003c\/td\u003e\n\u003ctd\u003eGraceful display tanks with gentle flow\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eChoose spotted blue-eyes if you want a compact, active, and slightly more patterned fish. Choose threadfins if you prefer a softer, ribbon-like look and a more delicate swimming style. Compared with larger rainbowfish, this species is easier to house in smaller aquariums and better suited to hobbyists asking \u003cstrong\u003ewhat tropical fish should i get\u003c\/strong\u003e for a calm community. If you are deciding between \u003cstrong\u003espotted blue-eye rainbowfish or threadfin rainbowfish\u003c\/strong\u003e, the answer usually comes down to whether you want more spotting and a little more activity, or a more flowing fin display.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpotted Blue-Eye Rainbowfish\u003c\/th\u003e\n\u003cth\u003ePaska'S Blue-Eye\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Shape\u003c\/td\u003e\n\u003ctd\u003eSlender, elongated\u003c\/td\u003e\n\u003ctd\u003eSlender, slightly more streamlined\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eSpots and black fin markings\u003c\/td\u003e\n\u003ctd\u003eBrighter blue eye emphasis\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTank Use\u003c\/td\u003e\n\u003ctd\u003eSmall planted community\u003c\/td\u003e\n\u003ctd\u003eSmall planted community\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor many keepers, the spotted blue-eye is the best balance of beauty, size, and practicality. It is a good answer to the question \u003cstrong\u003ewhat size fish should i get\u003c\/strong\u003e if you want something more interesting than a livebearer but less demanding than a large rainbowfish shoal.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Spotted Blue-Eye Rainbowfish \u0026amp; How to Prevent Them\u003c\/h2\u003e\n\u003cp\u003eHealthy spotted blue-eyes are active, alert, and eager to feed. They should swim evenly, hold their fins open, and show clear eyes with no clamped fins or white spots. Good \u003cstrong\u003espotted blue-eye rainbowfish health\u003c\/strong\u003e starts with clean water, stable temperature, and a varied diet. The most common problems are stress, fin damage, bacterial infections after poor transport, and parasites introduced by unquarantined fish. If you are searching \u003cstrong\u003espotted blue-eye rainbowfish diseases\u003c\/strong\u003e, most issues are actually husbandry-related rather than species-specific.\u003c\/p\u003e\n\u003cp\u003ePrevention is straightforward: keep ammonia and nitrite at zero, perform regular water changes, and avoid overcrowding. A mature filter and gentle maintenance routine matter more than expensive additives. If fish become pale, hide constantly, or stop eating, check water quality first. For treatment, move affected fish to a hospital tank if needed, improve aeration, and use medication only when you know the diagnosis. Because these fish are small, they can deteriorate quickly in poor conditions, so early action is important. This is especially true for anyone keeping them as \u003cstrong\u003espotted blue-eye rainbowfish for beginners\u003c\/strong\u003e in a first planted aquarium.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ NEVER use copper-based medications with invertebrates - lethal to shrimp!\u003c\/h4\u003e\n  \u003cp\u003eIf your aquarium also contains shrimp or snails, treat with extreme care and read labels closely. Copper can kill invertebrates even at low doses, so always separate treatment tanks when possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quarantine Protocol\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eKeep new fish in a separate tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eObserve feeding, breathing, and fin condition daily\u003c\/li\u003e\n    \u003cli\u003eMatch temperature and pH before transfer\u003c\/li\u003e\n    \u003cli\u003eUse a sponge filter and hiding places in quarantine\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003eMany customers ask about \u003cstrong\u003eaquarium fish delivery uk\u003c\/strong\u003e and whether transport stress affects health. It can, which is why acclimation matters. A slow drip or float acclimation helps new fish adjust to UK water conditions and reduces shock. If you are shopping for \u003cstrong\u003eaquarium fish for sale near me\u003c\/strong\u003e, \u003cstrong\u003eaquarium fish for sale near me open now\u003c\/strong\u003e, or \u003cstrong\u003eaquarium fish on sale near me\u003c\/strong\u003e, remember that the healthiest fish are usually the ones from sellers who quarantine properly and pack carefully.\u003c\/p\u003e\n\n\u003ch2 id=\"behavior\"\u003eUnderstanding Spotted Blue-Eye Rainbowfish Behavior in the Aquarium\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSpotted blue-eye rainbowfish behaviour\u003c\/strong\u003e is one of the main reasons people fall in love with them. They are active midwater swimmers that spend much of the day darting between plants, exploring open spaces, and displaying to each other. They are not aggressive, but males can show off with extended fins and quick chasing during courtship. In a proper group, this is normal and usually harmless. If the fish are kept singly or in too-small numbers, they may become shy and lose colour.\u003c\/p\u003e\n\u003cp\u003eThey are best described as shoaling fish rather than strict schoolers, although a larger group still improves confidence. Keep at least 8 together if possible, because that helps them settle and show more natural behaviour. They are most comfortable in a tank with cover near the surface and midwater, plus some open lanes for swimming. If you want to encourage natural behaviour, keep the tank calm, avoid sudden light changes, and feed small portions at consistent times. This species also responds well to a well-structured aquascape and is a good match for aquarists who enjoy observing subtle social interaction rather than constant drama.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWe prepare \u003cstrong\u003eSpotted Blue-Eye Rainbowfish\u003c\/strong\u003e with the same care we would want for our own planted community tanks. Each group is held in clean, stable water, monitored closely before sale, and packed to reduce stress during transit. That matters if you are looking for the \u003cstrong\u003ebest place to buy tropical fish online uk\u003c\/strong\u003e, the \u003cstrong\u003ebest online tropical fish uk\u003c\/strong\u003e seller, or the \u003cstrong\u003ebest tropical fish shop uk\u003c\/strong\u003e for a species that can be sensitive to poor handling. We also focus on acclimating fish to typical UK water conditions before dispatch, which helps them settle more quickly after arrival.\u003c\/p\u003e\n\u003cp\u003eAll live fish are professionally packed in insulated materials, and heat packs are used in colder months when needed. Orders are sent with tracked delivery, and our live arrival process is designed to give you confidence when you \u003cstrong\u003ebuy aquarium fish online uk\u003c\/strong\u003e or \u003cstrong\u003ebuy live fish online uk\u003c\/strong\u003e. If you are comparing \u003cstrong\u003ebest tropical fish delivery uk\u003c\/strong\u003e options, the difference is in the packing, the water quality, and the way the fish are conditioned before shipping. We also include care guidance so you know how to set up the tank, acclimate the fish, and feed them correctly from day one.\u003c\/p\u003e\n\u003cp\u003eWhether you are searching \u003cstrong\u003etropical fish uk for sale\u003c\/strong\u003e, \u003cstrong\u003ebuy tropical fish online uk\u003c\/strong\u003e, \u003cstrong\u003ebuy tropical fish online uk cheap\u003c\/strong\u003e, or even \u003cstrong\u003echeap tropical fish uk\u003c\/strong\u003e, the real value is healthy fish that arrive ready to settle. If you need help choosing a community, we can also advise on stock levels and compatibility, which is especially useful for customers asking about \u003cstrong\u003eaquarium with fish for sale near me\u003c\/strong\u003e or \u003cstrong\u003eaquarium fish wholesale uk\u003c\/strong\u003e style stocking plans.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Spotted Blue-Eye Rainbowfish\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eCarefully selected groups with strong fin shape and clear spotting\u003c\/li\u003e\n    \u003cli\u003ePre-dispatch observation to reduce transport stress and improve settling\u003c\/li\u003e\n    \u003cli\u003eInsulated, tracked live fish packing with seasonal heat protection\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003eOrder your \u003cstrong\u003eSpotted Blue-Eye Rainbowfish\u003c\/strong\u003e today with confidence if you want a peaceful, attractive species that brings movement and colour to a planted aquarium.\u003c\/p\u003e\n\n\u003ch2 id=\"related-products\"\u003eYou Might Also Like\u003c\/h2\u003e\n\u003cp\u003eComplete your setup with compatible species and practical foods that suit a calm tropical community. For similar blue-eye options, consider \u003ca href=\"\/products\/tropical-fish-uk\"\u003ePacific Blue-Eye\u003c\/a\u003e, \u003ca href=\"\/products\/tropical-fish-uk\"\u003ePaska'S Blue-Eye\u003c\/a\u003e, or \u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Rainbowfish\u003c\/a\u003e. If you are building a planted tank, pair them with \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British Tropical Fish Flake Food\u003c\/a\u003e and \u003ca href=\"\/products\/tropical-fish-uk\"\u003eKing British Tropical Fish Mini Pellets\u003c\/a\u003e for a reliable feeding routine. For a cleaner, easier setup, add a gentle \u003ca href=\"\/products\/tropical-fish-uk\"\u003esponge filter for tropical fish\u003c\/a\u003e and a dependable \u003ca href=\"\/products\/tropical-fish-uk\"\u003eaquarium heater for UK tropical tanks\u003c\/a\u003e. These additions help create the stable, low-stress environment that spotted blue-eyes need to thrive.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"2.5-4 cm","offer_id":57379819422031,"sku":"5160","price":11.99,"currency_code":"GBP","in_stock":false},{"title":"\u003e 4.5 cm","offer_id":57560695112015,"sku":"5161","price":19.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/tropical-fish-uk-spotted-blue-eye-rainbowfish-pseudomugil-gertrudae-hero-driftwood-5160.webp?v=1776547318","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/tropical-fish-uk-for-sale-buy-live-online-pseudomugil-gertrudae","provider":"Tropical Fish Co","version":"1.0","type":"link"}