6 × Rummy Nose Tetras (Hemigrammus rhodostomus) – Captive Bred

This listing is for a group of 6 Rummy Nose Tetras (Hemigrammus rhodostomus CB, 2-2.5 cm) — the same captive-bred fish as our single Rummy Nose Tetra listing, supplied as a small ready-made shoal.

Rummy Nose Tetras are among the tightest-schooling aquarium fish: in a group of six they hold formation beautifully, and their red noses and striped tails stay at full intensity when the shoal feels secure.

Rummy-Nose Tetras are one of the most rewarding tropical fish hobbyists can keep, because they combine a vivid red face, a tight schooling instinct, and a calm temperament that makes a planted community tank feel alive. Known scientifically as Hemigrammus rhodostomus, this South American tetra is loved for its “traffic-light” colour response: when water quality is excellent, the head stays bright red; when conditions slip, the colour fades quickly, making them a natural indicator fish for careful aquarists. At around 5 cm as adults, their size is ideal for medium community aquariums, and their lifespan can reach 5 years with stable water and a varied diet. They are peaceful, active mid-water swimmers, and in a group of 10+ (tight schooling) they create a stunning silver-and-red ribbon through the aquascape. This species is a good choice for aquarists who want beauty, movement, and behaviour that feels natural. See our detailed photos showing the red head, striped tail, and elegant body shape of this freshwater favourite. This guide will help you build the right environment and enjoy healthier, more confident fish.

Where Do Rummy-Nose Tetras Come From? Natural Habitat Explained

In the wild, their habitat is tied to the lower Amazon basin in Brazil, where slow-moving blackwater and soft, acidic tributaries provide the perfect setting. The species is part of the wider South American tropical fish import group, and its natural environment helps explain why it prefers a pH in the mildly acidic range, low mineral content, and gentle flow. In nature, they move in loose schools through leaf litter, submerged roots, and shaded margins, picking at tiny invertebrates, microfauna, and plant-based detritus. That is why a well-planned planted aquarium display looks so convincing: the fish feel secure among stems, driftwood, and dim background cover.

These fish are often seen in the middle water column, but in a quiet aquarium they may also rise to the top during feeding. They are not aggressive or fin nippers when kept correctly. Their wild habitat is warm and stable, which means their water temperature should stay close to 24-27°C and water hardness should remain low. They are hardy in the sense that they adapt well to a mature aquarium with good filtration and consistent maintenance. They are not a fish for poor water quality, and their colour is often the first clue when something is off.

How to Set Up the Perfect Tank for Rummy-Nose Tetras

What is the right tank size?

For a proper school, 80 litres is the minimum, but a 100-120 litre aquarium is much better if you want stable water and room for active swimming. Aim for 10-12 as a starting group, with 15 or more looking especially natural in larger tanks. A single small group in a cramped tank often becomes shy, while a larger shoal feels secure and displays stronger colour. A 20 gallon setup is tight and only suitable if the tank is long, lightly stocked, and very carefully maintained.

What water parameters do they need?

The best water conditions are soft, slightly acidic, and stable. Keep the temperature between 24-27°C and steady day and night, with a pH around 5.5-7.0. The ideal water hardness is 2-8 dGH, with low carbonate hardness and minimal swings. In practice, ideal conditions mean clean water, low nitrates, and no sudden changes. Remember that stability matters more than chasing exact numbers. They do best in a mature aquarium with regular water changes and a fully cycled filter.

Which filtration and flow work best?

Their filtration needs are moderate, but the water must stay clean and oxygen-rich. A sponge filter, hang-on-back filter, or a canister filter with adjustable output all work well as long as the current is gentle to moderate. They appreciate some flow, but not a blasting jet. A long aquarium with a spray bar or lily pipe helps create the soft movement they enjoy. Because they are sensitive to poor water quality, a mature biological filter is more important than raw power.

What substrate, plants, and decor should you use?

For a natural look, choose dark sand or fine gravel, then add driftwood, Indian almond leaves, and dense planting. Their aquarium setup benefits from shade and cover, especially with species like Amazon swords, Java fern, Cryptocoryne, and stem plants. They shine in planted aquarium layouts where open swimming space is balanced with background cover. A darker base also improves contrast, making the red head and striped tail stand out more strongly. If you want a more natural aquascape, pair them with other soft-water species and avoid bright, reflective decor that can make them nervous.

How much light do they need?

Moderate lighting for 6-8 hours per day is ideal. Too much light can make them skittish, while a heavily planted tank with floating plants creates the dappled shade they prefer. In a well-designed rummy nose tetra tank, the fish will school more tightly and show better colour against darker leaves and wood. A customer who upgraded from a bright bare tank to a planted blackwater-style setup reported that the fish stopped hiding and began schooling in the open within a week.

What Do Rummy-Nose Tetras Eat? Complete Feeding Guide

Rummy-nose tetras diet is omnivorous, with a strong preference for tiny foods they can pick up quickly. In the wild they feed on microcrustaceans, insect larvae, and organic matter, so in the aquarium they do best with high-quality flakes, micro pellets, and frozen or live foods. When choosing food, think small, varied, and frequent. They should not be fed large chunks or heavy foods that sink too fast. A good routine supports colour, activity, and breeding condition.

Staple foods should include a quality micro pellet or fine flake designed for small characins. Supplement with baby brine shrimp, daphnia, cyclops, and bloodworm in moderation. For breeding conditioning, live and frozen foods can help trigger spawning readiness. Avoid overfeeding, because these fish are small and the extra waste quickly affects water quality. Remember that food quality and portion control are tightly linked to health.

Time	Food	Amount
Morning	Micro pellets or fine flakes	Small pinch, eaten in under 1 minute
Evening	Frozen daphnia or baby brine shrimp	Small portion, 3-4 times per week

Foods to avoid include oversized pellets, stale dry food, and anything that clouds the water quickly. If you keep shrimp or other sensitive invertebrates, be careful with medicated foods and copper exposure. When comparing food options, choose products that stay small in the mouth and support colour without overloading the filter.

Rummy-Nose Tetras Appearance: Colors, Patterns & Varieties

Adults are usually around 5 cm, with a slim fusiform body and translucent silver sides. The most striking feature is the red head, which extends into the eye and can continue slightly into the front body. The tail is marked with black-and-white horizontal stripes, and the fins are mostly clear. Faded red colour is usually related to water quality, stress, or recent transport. A healthy fish should show a vivid red face, especially in a calm tank with good nutrition.

Male and female fish are hard to separate. Females tend to look slightly fuller when ripe, but there is no dramatic difference. The red head and striped tail are the key identifiers. Similar-looking species and trade names are also compared in the hobby. In image galleries, the fish often look even better under subdued light and against dark substrate, which is why our photos show the intense contrast that makes them so popular.

For aquascapers, the visual payoff is huge: a coordinated shoal moving through plants is one of the most elegant sights in freshwater fishkeeping.

What Fish Can Live With Rummy-Nose Tetras? Compatibility Guide

Tank mates should be peaceful, similarly sized, and comfortable in soft, warm water. They are a good community tank option because they are calm, active, and rarely cause trouble. Choose species that won’t outcompete them at feeding time or bully them in open water. They do especially well in planted aquariums with other South American species, and their school adds movement without aggression. They are not ideal with large, boisterous fish, and they should not be kept with predators that may view them as food.

Good companions include Cardinal Tetras, Glowlight Tetras - Hemigrammus Erythrozonus, Corydoras, dwarf cichlids, and peaceful pencilfish. Compatibility with angelfish depends on the angel’s size and temperament; small angels may coexist, but large adults can become predatory. Likewise, tank mates should not include aggressive cichlids or large predatory fish. For bottom dwellers, species such as Corydoras or kuhli loaches are excellent matches because they occupy different levels of the tank.

Species	Compatible?	Notes
Cardinal Tetras	✅ Yes	Similar water needs and peaceful schooling behaviour
Glowlight Tetras - Hemigrammus Erythrozonus	✅ Yes	Great mixed shoal option in planted tanks
Large predatory cichlids	❌ Avoid	Will stress or eat small schooling fish

For stocking examples, a 100 litre aquarium can hold 12 rummy-nose tetras with a group of Corydoras and a few dwarf cichlids, provided the filter is mature and the aquascape offers cover. More fish are usually better, because a larger group spreads social pressure and improves confidence. They are not considered aggressive, and they are rarely fin nippers. Shrimp and snails are usually safe, though tiny shrimp fry may be eaten opportunistically.

How to Breed Rummy-Nose Tetras: Complete Breeding Guide

Breeding rummy-nose tetras is considered difficult, which is why many aquarists keep them for display rather than reproduction. They need soft, acidic water, excellent hygiene, and careful conditioning. The breeding tank should be small, clean, and separate from the display, with dim light, fine-leaved plants or spawning mops, and a sponge filter. Success depends on water chemistry and patience.

Sexing fish is not easy. Females may appear rounder when carrying eggs, but the difference is subtle. Tetras do not become pregnant; they are egg scatterers, and their eggs are highly sensitive to fungus and bacteria. A sterile breeding tank, soft water, and antifungal support after spawning are key. For conditioning, feed live and frozen foods for 1-2 weeks before attempting a spawn.

Fry are tiny and slow-growing, so the main challenge is starting them on infusoria or very fine fry food before moving to baby brine shrimp. Many breeders report that breeding tank water that is too hard can prevent successful spawning. If you want to mimic natural conditions for breeding, keep the parents in soft water from the start rather than trying to adjust later. A blackwater setup with peat filtration and low lighting can help simulate natural spawning triggers.

Rummy-Nose Tetras vs Similar Species: Which Should You Choose?

Comparing species helps you choose the right fish for your tank, budget, and experience level. If you are deciding between rummy-nose, neon, cardinal, or ember tetras, the best choice depends on your water conditions and the look you want. Rummy-nose tetras are more sensitive than neon tetras, but they reward good care with tighter schooling and a more dramatic colour signal. They are also a favourite for aquascapers who want a fish that reacts visibly to water quality.

Feature	Rummy-Nose Tetras	Cardinal Tetras
Max Size	5 cm	5 cm
Care Level	Moderate	Moderate
Temperature	24-27°C	24-28°C
Best For	Planted community tanks with soft water	Soft-water display tanks with bold colour

For a second comparison, many hobbyists also look at hemigrammus erythrozonus because glowlight tetras are slightly easier for beginners and still offer a beautiful schooling effect. If you want the most forgiving fish, choose glowlights or neons. If you want a more refined indicator species with stronger visual feedback, choose rummy-nose tetras.

Common Health Problems in Rummy-Nose Tetras & How to Prevent Them

Healthy fish show a bright red face, clear eyes, smooth swimming, and active schooling. The most common health issues are stress, poor water quality, ich, fin damage from unsuitable tank mates, and bacterial infections after transport. If the red nose fades, the fish may be stressed, newly imported, or reacting to unstable water. Faded colour is often a warning sign, not a species trait.

Prevention starts with clean water, regular testing, and a varied diet. Keep nitrates low, avoid sudden pH swings, and quarantine new fish before adding them to the main aquarium. If you notice clamped fins, rapid breathing, or refusal to eat, move the fish to a hospital tank and check temperature, ammonia, and oxygen levels first. For beginners, the biggest lesson is that these fish are not difficult because they are fragile, but because they demand consistency. Their health often reflects the condition of the whole aquarium.

Understanding Rummy-Nose Tetra Behavior in the Aquarium

Their behaviour is one of the reasons aquarists love them. They are active shoalers, always moving together in a coordinated group, and they often tighten the school when startled. In a calm aquarium, they cruise the middle of the tank, occasionally darting upward for food. Rising to the top of the tank can be normal during feeding, while constant hiding usually means the tank is too bright, too small, or too busy. They are not solitary fish, and they look best when kept in a proper group.

Social behaviour is the key to success. If you keep too few, they can become nervous and lose colour. If you keep enough, they become bolder and more natural. Many aquarists describe them as one of the most elegant aquarium tetra species because the school moves as a single unit. Their calm nature also makes them a good match for aquascapes with gentle flow, floating plants, and soft background music from the filter. In a well-set tank, they will display more confidence, better feeding response, and stronger red colour.

Why Buy from Tropical Fish Co?

When you order rummy-nose tetras from Tropical Fish Co, you get fish selected for strong schooling behaviour, healthy colour, and clean, active presentation. Our stock is acclimated to UK aquarium conditions before sale, which helps reduce stress after arrival and supports better long-term success. It matters that the fish are properly handled from the start. We pack live fish in insulated packaging, use tracked delivery, and add heat packs in winter when needed to protect them in transit. Every order is prepared with professional packing methods designed to keep oxygen, temperature, and water quality stable.

We also answer pricing questions and provide care advice and post-purchase guidance, so you can set up the right tank before your fish arrive. The value comes from healthy fish that settle quickly. We include care guidance to help with acclimation, feeding, and long-term maintenance. Order your rummy-nose tetras today with confidence and build a school that looks stunning from day one.

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Complete your South American community with Cardinal Tetras for a larger red-and-blue shoal, or Glowlight Tetras - Hemigrammus Erythrozonus for a softer, beginner-friendly alternative. For the bottom level, add Corydoras to keep the tank active without disturbing the school. If you want a more planted look, pair them with live aquarium plants and a gentle aquarium filter. For nutrition, a quality micro pellet food helps maintain colour and condition. These choices work together to create a stable, attractive, and natural-looking aquarium.