{"product_id":"congo-tetra-phenacogrammus-interruptus-del-for-sale-uk","title":"Congo Tetra (Phenacogrammus interruptus) - UK","description":"\u003cp\u003eThe \u003cstrong\u003eCongo Tetra\u003c\/strong\u003e, \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e, is one of the most striking freshwater tetra species in the hobby. Known as \u003cstrong\u003etetra del congo\u003c\/strong\u003e in many listings, this elegant \u003cstrong\u003eAfrican Congo Tetra\u003c\/strong\u003e combines shimmering rainbow scales, flowing fins, and calm schooling behaviour in a way few \u003cstrong\u003eafrican tetras\u003c\/strong\u003e can match. Adult fish reach a useful \u003cstrong\u003econgo tetra size\u003c\/strong\u003e of around 8 cm, making them a true \u003cstrong\u003elarge peaceful tetra UK\u003c\/strong\u003e hobbyists can enjoy in a spacious community aquarium. With the right \u003cstrong\u003econgo tetra tank setup\u003c\/strong\u003e, stable \u003cstrong\u003econgo tetra water parameters\u003c\/strong\u003e, and a proper school, they reward keepers with superb colour, confident midwater swimming, and a lifespan of around five years.\u003c\/p\u003e\u003cp\u003eIf you want an \u003cstrong\u003eiridescent schooling fish UK\u003c\/strong\u003e aquarists regularly admire, the \u003cstrong\u003eCongo Fish\u003c\/strong\u003e is a brilliant choice. It is often recommended as the \u003cstrong\u003ebest African tetra for aquarium\u003c\/strong\u003e displays because it offers the movement of a tetra with the presence of a larger show fish. See our detailed photos showing the metallic blue, violet, gold, and red sheen that gives the \u003cstrong\u003eRainbow Congo Tetra\u003c\/strong\u003e its reputation as a \u003cstrong\u003estunning rainbow tetra for large tank\u003c\/strong\u003e layouts. For fishkeepers building a peaceful planted community, this species brings colour, grace, and real personality without the constant drama of more aggressive tropical species.\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\u003ePhenacogrammus interruptus\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 150 litres (33 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 Alestidae\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenus:\u003c\/strong\u003e \u003cem\u003ePhenacogrammus\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e is a true African characin rather than a South American tetra. In the aquarium trade it stands apart from common community tetras because of its larger adult size, elongated finnage in males, and strong iridescence. Related fish in the family include other African tetra species, though the Congo Tetra remains the best known and most widely kept.\u003c\/p\u003e\n\u003c\/div\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\"\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\"\u003e3-12 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\"\u003e150L+\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eTank Size\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Congo Tetras Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003eThe natural \u003cstrong\u003ePhenacogrammus interruptus habitat\u003c\/strong\u003e is the Congo River Basin in Central Africa. This vast river system includes slower tributaries, floodplain waters, and shaded margins where leaf litter, roots, and overhanging vegetation soften the light. In the wild, the \u003cstrong\u003eCongo Tetra\u003c\/strong\u003e lives in warm, slightly acidic to neutral water with gentle current and plenty of cover. That background explains why this species does so well in a mature, planted aquarium with dark décor and open swimming space.\u003c\/p\u003e\u003cp\u003eAs an \u003cstrong\u003eAfrican tetra UK\u003c\/strong\u003e keepers often seek for larger displays, this fish differs from many South American tetras in both body shape and presence. Wild fish feed on small invertebrates, insect larvae, plant matter, and suspended organic foods. That natural diet supports the broad \u003cstrong\u003econgo tetra diet\u003c\/strong\u003e we use in aquariums today. When hobbyists recreate these conditions, the fish settle faster, school more naturally, and show stronger colour.\u003c\/p\u003e\u003cp\u003eYou may also see names such as \u003cstrong\u003eblue eyed congo tetra\u003c\/strong\u003e, \u003cstrong\u003egolden congo tetra\u003c\/strong\u003e, \u003cstrong\u003ered congo tetra\u003c\/strong\u003e, \u003cstrong\u003eyellow congo tetra\u003c\/strong\u003e, \u003cstrong\u003eorange flash congo tetra\u003c\/strong\u003e, or even \u003cstrong\u003eblue diamond congo tetra\u003c\/strong\u003e in searches and hobby discussion. Most of these refer to colour impressions, trade names, or related forms rather than a separate standard species in the trade. Likewise, names such as \u003cstrong\u003eblack morpho tetra\u003c\/strong\u003e and \u003cstrong\u003ephenacogrammus sp. fantastique\u003c\/strong\u003e appear in enthusiast circles, but the classic aquarium species remains \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e.\u003c\/p\u003e\u003cp\u003eBecause the Congo Basin is rich in tannins, submerged roots, and seasonal plant growth, a \u003cstrong\u003econgo tetra for planted aquarium\u003c\/strong\u003e layout makes perfect sense. A mature aquascape with floating cover and darker substrate often produces that calm, glowing look people describe as \u003cstrong\u003efantastique congo tetra\u003c\/strong\u003e colour. Even if you are keeping them in a brighter community tank, adding wood, tall background plants, and shaded edges helps them feel secure.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimicking the natural habitat of \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e with subdued lighting, driftwood, and a planted midground usually improves colour, reduces skittishness, and encourages tighter schooling. Many keepers notice males display far better in slightly dimmed, mature tanks than in bare bright setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow Do You Set Up the Perfect Tank for Congo Tetras?\u003c\/h2\u003e\n\u003cp\u003eA successful \u003cstrong\u003econgo tetra care guide\u003c\/strong\u003e always starts with space. The recommended \u003cstrong\u003econgo tetra tank size\u003c\/strong\u003e is at least 150 litres, but a 180-240 litre aquarium is even better for a full group. These fish are active midwater swimmers, and their long fins look best when they have room to cruise rather than pivot constantly. If you are wondering \u003cstrong\u003econgo tetra how many\u003c\/strong\u003e to keep, the \u003cstrong\u003econgo tetra minimum school size\u003c\/strong\u003e is six, though eight to ten produces more natural behaviour and less shyness. A \u003cstrong\u003econgo tetra school of 5\u003c\/strong\u003e can survive, but it is not ideal for long-term confidence or display.\u003c\/p\u003e\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eBecause adults reach a notable \u003cstrong\u003econgo tetra size\u003c\/strong\u003e, this is not a nano fish. A 90 cm tank is the practical minimum, while 120 cm length is better for a proper school. In a larger aquarium, the fish spread social tension, males display more evenly, and the group becomes a far more impressive \u003cstrong\u003eschooling fish UK\u003c\/strong\u003e feature. For buyers looking for a \u003cstrong\u003ebest large tetra for community tank\u003c\/strong\u003e choice, this size is exactly why the species stands out.\u003c\/p\u003e\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe ideal \u003cstrong\u003econgo tetra temperature\u003c\/strong\u003e is 23-28°C, with the safe \u003cstrong\u003ePhenacogrammus interruptus temperature range\u003c\/strong\u003e matching those values. Stable warmth matters more than chasing an exact number, so many keepers aim for 24-26°C in a mixed tropical setup. The preferred \u003cstrong\u003econgo tetra pH range\u003c\/strong\u003e is 6.0-7.5, and moderate softness suits them best. Good \u003cstrong\u003econgo tetra water hardness\u003c\/strong\u003e sits around 3-12 dGH. These are the core \u003cstrong\u003econgo tetra water parameters\u003c\/strong\u003e to maintain if you want strong colour and steady health.\u003c\/p\u003e\n\u003ch3\u003eFiltration and Flow\u003c\/h3\u003e\n\u003cp\u003eUse a reliable external filter or a high-quality internal filter that turns the tank over without creating harsh current. Congo Tetras come from areas with movement, but not blasting flow. Gentle circulation keeps oxygen high and waste low while allowing the fish to hold the middle of the tank comfortably. If your outlet is too strong, use spray bars or angle the flow toward the glass.\u003c\/p\u003e\n\u003ch3\u003eSubstrate, Plants and Décor\u003c\/h3\u003e\n\u003cp\u003eA dark sand or fine gravel substrate makes their metallic colours pop. This species is excellent as a \u003cstrong\u003econgo tetra planted tank\u003c\/strong\u003e centrepiece because it appreciates cover without constantly hiding. Good plant choices include Vallisneria, Amazon swords, Cryptocoryne, floating plants, and stem plants that soften the background. A true \u003cstrong\u003econgo tetra planted tank\u003c\/strong\u003e should include open swimming lanes in the centre, dense planting at the rear, and wood or branch structures to break sight lines.\u003c\/p\u003e\u003cp\u003eIf you are building a display around this species, you can also browse our \u003ca href=\"\/products\/congo-tetra\"\u003eCongo Tetra Tropical Fish Aquarium Tank\u003c\/a\u003e listing for another group option, or pair them visually with the shimmering \u003ca href=\"\/products\/blue-tetra\"\u003ex Cochus Blue Tetra 6 fish\u003c\/a\u003e in a larger tetra community. For a contrasting body shape and colour, the \u003ca href=\"\/products\/bleeding-heart-fish\"\u003eBleeding Heart Tetra\u003c\/a\u003e works well in spacious, peaceful tanks.\u003c\/p\u003e\n\u003ch3\u003eLighting\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is ideal. Very intense light can wash them out and make them cautious, especially in a sparse tank. Floating plants or shaded corners help. In a well-balanced \u003cstrong\u003econgo tetra for planted aquarium\u003c\/strong\u003e layout, six to eight hours of moderate light is often enough to support plants while still flattering the fish.\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 150 litres, ideally 180 litres or more\u003c\/li\u003e\n    \u003cli\u003eKeep a group of 6+, with 8-10 preferred\u003c\/li\u003e\n    \u003cli\u003eMaintain 23-28°C and pH 6.0-7.5\u003c\/li\u003e\n    \u003cli\u003eUse dark substrate and plant the back and sides heavily\u003c\/li\u003e\n    \u003cli\u003eLeave open midwater swimming space\u003c\/li\u003e\n    \u003cli\u003eFit mature filtration with gentle 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 aquarium for 4-6 weeks before adding Congo Tetras. This species handles stable, mature tanks well but can become stressed in newly set up aquariums with fluctuating ammonia or nitrite.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Congo Tetras Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003econgo tetra diet\u003c\/strong\u003e is omnivorous, which makes feeding simple as long as you provide variety. In nature they pick at tiny crustaceans, insect larvae, and plant material. In the home aquarium, good \u003cstrong\u003econgo tetra feeding\u003c\/strong\u003e means combining a quality flake or micro pellet with frozen and live foods several times per week. This not only supports health but also deepens colour and conditions fish for spawning.\u003c\/p\u003e\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eUse a quality tropical flake or small slow-sinking pellet as the daily base. Because these fish feed mainly in the middle of the tank, foods that remain suspended briefly are ideal. A community staple works well for this \u003cstrong\u003efreshwater tetra UK\u003c\/strong\u003e favourite.\u003c\/p\u003e\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eFrozen bloodworm, daphnia, brine shrimp, and cyclops are excellent additions. These help maintain body condition, especially in adult males with long finnage. If you are keeping a \u003cstrong\u003econgo tetra for community tank\u003c\/strong\u003e setup with other midwater fish, make sure food reaches all areas so the group is not outcompeted by faster feeders.\u003c\/p\u003e\n\u003ch3\u003eTreats and Conditioning Foods\u003c\/h3\u003e\n\u003cp\u003eFor breeding or colour, offer live daphnia, mosquito larvae, or baby brine shrimp. Many keepers notice that the so-called \u003cstrong\u003eBlue Congo Tetra\u003c\/strong\u003e or \u003cstrong\u003eRainbow Congo Tetra\u003c\/strong\u003e look intensifies after a week or two of mixed frozen foods. This is especially useful before attempting \u003cstrong\u003econgo tetra breeding\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eFeeding Frequency and Portion Control\u003c\/h3\u003e\n\u003cp\u003eFeed adults twice daily in portions they finish within 30-60 seconds. Juveniles can be fed three smaller meals. Good \u003cstrong\u003econgo tetra care\u003c\/strong\u003e is less about feeding heavily and more about feeding consistently. Overfeeding quickly spoils water quality in a warm tetra aquarium.\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\u003eQuality flake or small pellet\u003c\/td\u003e\n\u003ctd\u003eSmall pinch, eaten within 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFrozen brine shrimp, daphnia, or bloodworm\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\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/congo-tetra\"\u003eCongo Tetra Tropical Fish Aquarium Tank\u003c\/a\u003e\n  \u003cp\u003eIdeal if you want to expand an existing school so feeding behaviour becomes more natural and less timid.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/blue-tetra\"\u003ex Cochus Blue Tetra 6 fish\u003c\/a\u003e\n  \u003cp\u003eA useful companion species in larger tetra communities where similar feeding habits make routine care straightforward.\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 stressed fish. Congo Tetras are active feeders, so it is easy to give too much. Remove leftovers promptly and keep meals small but varied.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Does a Congo Tetra Look Like? Colors, Fins and Varieties\u003c\/h2\u003e\n\u003cp\u003eThe adult \u003cstrong\u003eCongo Tetra\u003c\/strong\u003e is deeper-bodied than a neon-type tetra and far more dramatic in profile. Mature males develop extended dorsal, anal, and caudal fin rays that trail beautifully in open water. Their body flashes blue, violet, gold, silver, and amber depending on angle and lighting. This is why the species is often marketed as a \u003cstrong\u003eRainbow Congo Tetra\u003c\/strong\u003e or a showy \u003cstrong\u003eCongo Fish\u003c\/strong\u003e for display aquariums.\u003c\/p\u003e\u003cp\u003eFemales are plainer but still attractive, with a softer silver-gold body and shorter fins. When comparing \u003cstrong\u003econgo tetra male vs female\u003c\/strong\u003e, the easiest signs are finnage and colour intensity. A \u003cstrong\u003emale congo tetra\u003c\/strong\u003e is larger-looking, more iridescent, and more elongated in the fins. A \u003cstrong\u003efemale congo tetra\u003c\/strong\u003e or \u003cstrong\u003econgo tetra female\u003c\/strong\u003e is rounder through the body, especially when carrying eggs, and has more compact fins. A mature \u003cstrong\u003econgo tetra male\u003c\/strong\u003e is unmistakable once settled.\u003c\/p\u003e\u003cp\u003eSearch terms such as \u003cstrong\u003ealbino congo tetra\u003c\/strong\u003e, \u003cstrong\u003echerry red congo tetra\u003c\/strong\u003e, \u003cstrong\u003eblue diamond congo tetra\u003c\/strong\u003e, \u003cstrong\u003eorange flash congo tetra\u003c\/strong\u003e, and \u003cstrong\u003eblue diamond congo tetra\u003c\/strong\u003e often reflect selective lines, lighting effects, or trade descriptions rather than a standard separate species. The classic form of \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e already shows enough colour variation that one group can appear blue, gold, or red-toned at different times of day.\u003c\/p\u003e\u003cp\u003eOur photos show the reflective sheen best when fish are settled in a dark-backed, planted aquarium. This is one species where décor makes a huge difference. A pale bare tank can make them look average, while a mature aquascape reveals why so many aquarists search for \u003cstrong\u003ePhenacogrammus interruptus for sale online UK\u003c\/strong\u003e and compare \u003cstrong\u003ePhenacogrammus interruptus price UK\u003c\/strong\u003e before buying.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Congo Tetras? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eOne of the most common questions is \u003cstrong\u003eare congo tetras aggressive\u003c\/strong\u003e. In normal conditions, no. The species is peaceful and works well as a \u003cstrong\u003econgo tetra for community tank\u003c\/strong\u003e option. However, a stressed or undersized group may become nippy around long fins, especially at feeding time. Reports of \u003cstrong\u003econgo tetra aggressive\u003c\/strong\u003e behaviour usually trace back to cramped tanks, too few fish, or unsuitable tank mates.\u003c\/p\u003e\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eGood \u003cstrong\u003econgo tetra tank mates\u003c\/strong\u003e include other peaceful medium-sized species that enjoy similar water conditions. Corydoras, rainbowfish, peaceful dwarf cichlids, and larger calm tetras are all strong choices. In a spacious aquarium, they can also live with the \u003ca href=\"\/products\/bleeding-heart-fish\"\u003eBleeding Heart Tetra\u003c\/a\u003e and the \u003ca href=\"\/products\/blue-tetra\"\u003ex Cochus Blue Tetra 6 fish\u003c\/a\u003e. If you want a species-only display, adding another group from our \u003ca href=\"\/products\/congo-tetra\"\u003eCongo Tetra Tropical Fish Aquarium Tank\u003c\/a\u003e listing helps create a fuller school.\u003c\/p\u003e\n\u003ch3\u003eCongo Tetra with Angelfish\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCongo tetra with angelfish\u003c\/strong\u003e can work in a large, calm aquarium, but it is a caution pairing. Adult angelfish may ignore them, yet some angels will test the long fins of male Congo Tetras, while some Congo Tetras may peck at slow angelfish during feeding. It depends heavily on tank size, temperament, and whether both groups are well established.\u003c\/p\u003e\n\u003ch3\u003eCongo Tetra with Discus\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCongo tetra with discus\u003c\/strong\u003e is possible in large, warm, stable aquariums, but again it needs care. Discus prefer very calm conditions and frequent feeding, while Congo Tetras are more active. If kept together, ensure the discus are not stressed or outcompeted. This is a pairing for experienced keepers, not a beginner community.\u003c\/p\u003e\n\u003ch3\u003eSpecies to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid tiger barbs, aggressive cichlids, and persistent fin nippers. Very small shrimp may also be at risk, especially if the fish are underfed. Fast, rough tank mates spoil the elegant display that makes this \u003cstrong\u003etropical tetra UK\u003c\/strong\u003e favourite so desirable.\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\/bleeding-heart-fish\"\u003eBleeding Heart Tetra\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eSimilar size and calm temperament in larger tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/blue-tetra\"\u003ex Cochus Blue Tetra 6 fish\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eWorks in spacious tetra communities with good planting\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAngelfish\u003c\/td\u003e\n\u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n\u003ctd\u003ePossible in large tanks, but watch for fin interest\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiscus\u003c\/td\u003e\n\u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n\u003ctd\u003eRequires warm, stable water and careful feeding balance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTiger Barbs\u003c\/td\u003e\n\u003ctd\u003e❌ Avoid\u003c\/td\u003e\n\u003ctd\u003eToo nippy for long-finned males\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are comparing \u003cstrong\u003econgo tetra vs cardinal tetra\u003c\/strong\u003e or \u003cstrong\u003econgo tetra vs neon tetra\u003c\/strong\u003e, remember that Congo Tetras are much larger and better suited to medium-to-large aquariums. Compared with a \u003cstrong\u003ecardinal tetra\u003c\/strong\u003e, they need more swimming room and a more deliberate stocking plan. Compared with an \u003cstrong\u003eemperor tetra\u003c\/strong\u003e, they are generally less territorial but need a bigger tank and larger group. That makes them a standout \u003cstrong\u003elarge tetra UK\u003c\/strong\u003e option for aquarists who want movement without aggression.\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 tetra community. This reduces the risk of parasites, protects existing fish, and gives shy Congo Tetras a calmer introduction.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow Do You Breed Congo Tetras? Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCongo tetra breeding\u003c\/strong\u003e is possible in home aquariums, but it is moderate rather than easy. Adults are egg scatterers, and the parents will eat eggs if given the chance. A separate breeding tank is strongly recommended. This is not like \u003cstrong\u003ebreeding gold tetras\u003c\/strong\u003e in a casual community setup; success depends on preparation, soft water, and careful fry management.\u003c\/p\u003e\n\u003ch3\u003eSexing and Ratios\u003c\/h3\u003e\n\u003cp\u003eUnderstanding \u003cstrong\u003econgo tetra male vs female\u003c\/strong\u003e is the first step. The \u003cstrong\u003emale congo tetra\u003c\/strong\u003e has longer fins and stronger iridescence, while the \u003cstrong\u003efemale congo tetra\u003c\/strong\u003e is fuller-bodied and less ornate. A practical \u003cstrong\u003econgo tetra male to female ratio\u003c\/strong\u003e is one male to two females in a spawning setup, though groups can also work if the tank is large enough.\u003c\/p\u003e\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eUse a 45-60 litre tank with soft, slightly acidic water, subdued light, and spawning mops or fine-leaved plants. Keep temperature near the upper end of the species range. Condition the fish with rich live and frozen foods for one to two weeks before pairing. A dark base and quiet surroundings help.\u003c\/p\u003e\n\u003ch3\u003eSpawning Behaviour and Eggs\u003c\/h3\u003e\n\u003cp\u003eThe male will display intensely, often circling and quivering beside the female. Eggs are scattered among plants or mops. Remove adults after spawning. Depending on temperature, eggs usually hatch in several days. The exact timing varies, but stable warmth and clean water are essential.\u003c\/p\u003e\n\u003ch3\u003eFry Care and Growth\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCongo tetra fry\u003c\/strong\u003e are small and need infusoria or liquid fry food at first, followed by newly hatched brine shrimp. Good hygiene matters because fry are sensitive to deteriorating water. The \u003cstrong\u003econgo tetra growth rate\u003c\/strong\u003e is steady rather than rapid; young fish take time to show full adult colour and finnage.\u003c\/p\u003e\n\u003cp\u003eSome hobbyists researching related species also search \u003cstrong\u003ephenacogrammus aurantiacus breeding\u003c\/strong\u003e or \u003cstrong\u003elampeye congo tetra for sale\u003c\/strong\u003e, but the classic \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e remains the most accessible Congo-type tetra for home breeding. In multilingual searches you may also see \u003cstrong\u003epez tetra congo\u003c\/strong\u003e used for the same fish.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eFor better hatch rates, use very dim light and remove adults immediately after spawning. Many breeders also place a mesh or marbles on the base so eggs fall out of reach, which greatly reduces egg predation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eCongo Tetra vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eComparing similar fish helps you choose the right tetra for your tank size, style, and experience level. The \u003cstrong\u003eCongo Tetra\u003c\/strong\u003e is often weighed against species like the \u003cstrong\u003ediamond tetra\u003c\/strong\u003e, \u003cstrong\u003eblack phantom tetra\u003c\/strong\u003e, \u003cstrong\u003ecardinal tetra\u003c\/strong\u003e, and \u003cstrong\u003eemperor tetra\u003c\/strong\u003e. Each has its place, but they are not interchangeable.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eCongo Tetra\u003c\/th\u003e\n\u003cth\u003eDiamond 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\u003e8 cm\u003c\/td\u003e\n\u003ctd\u003e6 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-Moderate\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\u003eVaries by group size\u003c\/td\u003e\n\u003ctd\u003eUsually lower\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eLarge planted show tanks\u003c\/td\u003e\n\u003ctd\u003eSmaller community aquariums\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\u003eCongo Tetra\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\u003eMax Size\u003c\/td\u003e\n\u003ctd\u003e8 cm\u003c\/td\u003e\n\u003ctd\u003e5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSchool Impact\u003c\/td\u003e\n\u003ctd\u003eLarge, flowing display\u003c\/td\u003e\n\u003ctd\u003eTight, colourful shoal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTank Size\u003c\/td\u003e\n\u003ctd\u003e150L+\u003c\/td\u003e\n\u003ctd\u003e60L+\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eFeature fish in big communities\u003c\/td\u003e\n\u003ctd\u003eClassic small tetra schools\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperament\u003c\/td\u003e\n\u003ctd\u003ePeaceful, active\u003c\/td\u003e\n\u003ctd\u003ePeaceful, smaller\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIn a direct \u003cstrong\u003ePhenacogrammus interruptus vs diamond tetra\u003c\/strong\u003e comparison, the Congo Tetra is the more dramatic fish, especially when adult males are fully developed. If you want a compact school for a smaller tank, the diamond tetra is easier. If you want a graceful centrepiece shoal, the Congo wins. The same applies in \u003cstrong\u003econgo tetra vs emperor tetra\u003c\/strong\u003e decisions: emperors suit smaller aquariums and have a different, more assertive social style, while Congo Tetras are better for broad midwater displays.\u003c\/p\u003e\u003cp\u003eFor buyers considering \u003cstrong\u003econgo tetra for beginners\u003c\/strong\u003e, the species is manageable if the tank is large enough and mature. It is not difficult in terms of feeding or aggression, but it does punish cramped or unstable setups. If you want the classic big, shimmering tetra look, this is still the \u003cstrong\u003ebest African tetra for aquarium\u003c\/strong\u003e use in planted communities.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eWhat Common Health Problems Affect Congo Tetras and How Can You Prevent Them?\u003c\/h2\u003e\n\u003cp\u003eHealthy Congo Tetras are alert, midwater active, and brightly reflective. Fins should be open, not clamped. The body should look full but not bloated, and the school should move together rather than hiding constantly. Good health starts with stable water, proper group size, and low stress.\u003c\/p\u003e\n\u003ch3\u003eCommon Issues\u003c\/h3\u003e\n\u003cp\u003eThe main \u003cstrong\u003econgo tetra disease\u003c\/strong\u003e risks are the same problems seen in many tropical community fish: ich, fin damage from nippy tank mates, bacterial infections after stress, and wasting from poor diet or internal parasites. Because males have long fins, they can show damage quickly if housed with unsuitable companions. Sudden colour loss often points to stress, transport shock, or poor water quality rather than a unique species-specific illness.\u003c\/p\u003e\n\u003ch3\u003ePrevention\u003c\/h3\u003e\n\u003cp\u003eKeep ammonia and nitrite at zero, nitrate low, and avoid abrupt changes in temperature or pH. Follow the correct \u003cstrong\u003econgo tetra pH range\u003c\/strong\u003e and do weekly water changes of 25-30%. A varied diet and a proper school reduce stress. Many issues blamed on the fish are really setup problems, especially in tanks below the correct \u003cstrong\u003econgo tetra tank size\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eTreatment and Quarantine\u003c\/h3\u003e\n\u003cp\u003eIf a fish looks unwell, move it to a separate hospital tank if possible. Observe for white spots, heavy breathing, frayed fins, or loss of balance. Use medications carefully and always confirm they are suitable for your stock list. If shrimp or snails are present, treatment choice matters even more.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Medication Warning\u003c\/h4\u003e\n  \u003cp\u003eNEVER use copper-based medications with invertebrates in the tank. Copper can be lethal to shrimp and other sensitive species. If you keep mixed livestock, treat in a separate hospital aquarium whenever possible.\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\u003eKeep new fish in a separate tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eMatch temperature and pH gradually to reduce stress\u003c\/li\u003e\n    \u003cli\u003eWatch for white spot, clamped fins, or flashing\u003c\/li\u003e\n    \u003cli\u003eFeed lightly at first and monitor appetite daily\u003c\/li\u003e\n    \u003cli\u003eOnly move fish to the display tank once fully settled\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"behavior\"\u003eHow Do Congo Tetras Behave in the Aquarium?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCongo tetra behaviour\u003c\/strong\u003e is one of the species' biggest strengths. They are peaceful, active, and social, spending most of their time in the middle of the tank. Newly introduced fish can be shy, but once settled they become confident and highly visible. A proper school transforms the tank, with males displaying to one another in short, elegant bursts rather than full combat.\u003c\/p\u003e\u003cp\u003eIf you are asking \u003cstrong\u003econgo tetra aggressive\u003c\/strong\u003e or \u003cstrong\u003eare congo tetras aggressive\u003c\/strong\u003e, the answer is usually no in a suitable setup. Problems appear when the group is too small, the tank is too cramped, or there are long-finned fish that trigger curiosity. In the right environment, this is an ideal \u003cstrong\u003ecommunity fish UK\u003c\/strong\u003e choice and a standout \u003cstrong\u003eschooling fish UK\u003c\/strong\u003e species for planted aquariums.\u003c\/p\u003e\u003cp\u003eTo encourage natural behaviour, keep them in a group of at least six, provide open swimming room, and use planting to create security. This is why the species excels as a \u003cstrong\u003econgo tetra planted tank\u003c\/strong\u003e fish. In mature tanks, males often intensify in colour during displays, showing the metallic flashes that make the species famous.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy Congo Tetras from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWhen people search \u003cstrong\u003ebuy congo tetra UK\u003c\/strong\u003e, \u003cstrong\u003ebuy congo tetra online UK\u003c\/strong\u003e, \u003cstrong\u003econgo tetra buy online UK\u003c\/strong\u003e, or \u003cstrong\u003econgo tetra for sale UK\u003c\/strong\u003e, they are usually looking for more than a fish list. They want healthy stock, correct sizing, and a group that settles quickly. Our Congo Tetras are selected for strong body shape, active schooling behaviour, and the early colour development that shows you are getting genuine quality \u003cem\u003ePhenacogrammus interruptus\u003c\/em\u003e, not washed-out imports that struggle after transport.\u003c\/p\u003e\u003cp\u003eEach group is observed before dispatch, and fish are only sent once feeding well and showing stable behaviour. Because this species can be shy straight after shipping, careful packing matters. Fish are bagged professionally, insulated for travel, and sent with seasonal heat protection when needed. That is especially important for a moderate-care species with long fins and a reputation for looking its best only after proper settling time.\u003c\/p\u003e\u003cp\u003eIf you are comparing \u003cstrong\u003econgo tetra price\u003c\/strong\u003e, \u003cstrong\u003econgo tetra for sale\u003c\/strong\u003e, \u003cstrong\u003econgo tetra school for sale UK\u003c\/strong\u003e, or even \u003cstrong\u003erainbow congo tetra buy UK\u003c\/strong\u003e, remember to compare group quality and condition, not just headline cost. A settled, well-started school gives better colour, lower losses, and a much smoother introduction to your display tank. For many keepers wanting to \u003cstrong\u003ebuy African congo tetra UK\u003c\/strong\u003e, that difference is worth it from day one.\u003c\/p\u003e\u003cp\u003eOrder your \u003cstrong\u003eCongo Tetra\u003c\/strong\u003e today with confidence if you want a real show-school for a spacious tropical aquarium. Whether you are building a planted display or upgrading a larger community, this species offers size, shimmer, and calm movement that few tetras can match.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Congo Tetra\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eGroups selected for active schooling behaviour and clear early colour development\u003c\/li\u003e\n    \u003cli\u003eObserved before dispatch so fish are feeding and stable before travel\u003c\/li\u003e\n    \u003cli\u003ePacked for UK conditions with insulation and seasonal heat protection where needed\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\u003eComplete a larger tetra display with another group from our \u003ca href=\"\/products\/congo-tetra\"\u003eCongo Tetra Tropical Fish Aquarium Tank\u003c\/a\u003e listing if you want a fuller school. For a contrasting but compatible shimmer, consider the \u003ca href=\"\/products\/blue-tetra\"\u003ex Cochus Blue Tetra 6 fish\u003c\/a\u003e. If you prefer a deeper-bodied tetra companion, the \u003ca href=\"\/products\/bleeding-heart-fish\"\u003eBleeding Heart Tetra\u003c\/a\u003e is an excellent match in spacious planted aquariums. These options work especially well for aquarists building a peaceful, midwater-focused African and South American tetra mix with strong movement and colour contrast.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"2 - 3 cm","offer_id":57379746349391,"sku":"S012","price":5.99,"currency_code":"GBP","in_stock":true},{"title":"2 - 3 cm (S013)","offer_id":57456888152399,"sku":"S013","price":12.99,"currency_code":"GBP","in_stock":true},{"title":"3 - 4 cm","offer_id":57467453571407,"sku":"2011","price":5.99,"currency_code":"GBP","in_stock":true},{"title":"4 - 5 cm","offer_id":57467453604175,"sku":"2012","price":5.99,"currency_code":"GBP","in_stock":true},{"title":"XL \u003e 6 cm","offer_id":57467453636943,"sku":"2014","price":13.99,"currency_code":"GBP","in_stock":true},{"title":"5-6 cm","offer_id":57560370970959,"sku":"2013","price":6.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/congo-tetra-x-congo-tetra-tropical-fish-aquarium-tank-plant-vibrant-hero-driftwood-s012_112ce0fe-69b0-4404-b9b9-7b73da19b215.webp?v=1776545973","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/congo-tetra-phenacogrammus-interruptus-del-for-sale-uk","provider":"Tropical Fish Co","version":"1.0","type":"link"}