Care Guide for Rummy Nose Tetra

Rummy Nose Tetra is one of the most visually striking and active freshwater fish in the aquarium hobby. Known for their stunning appearances, these fish create an incredible display when swimming together in schools. While peaceful and community-friendly, they are more sensitive to water quality than many beginner fish, making proper tank setup and maintenance essential. In this guide, you’ll learn how to care for Rummy Nose Tetras, including ideal water parameters, tank size, diet, tank mates, and breeding tips to keep them healthy and vibrant.

Rummy Nose Tetra or Rummynose Rasbora? Getting the Species Right

Two very different fish share the "rummy nose" nickname, and they do not share care requirements. Before you set up a tank, make sure you know which one you are keeping:

• Rummy Nose Tetra (a South American tetra): A characin from the Amazon basin. Three closely related species are sold under this name: Petitella bleheri (also called the Firehead Tetra, formerly Hemigrammus bleheri), Petitella rhodostoma (formerly Hemigrammus rhodostomus), and Petitella georgiae (the False Rummynose Tetra). The first two were moved from Hemigrammus into the genus Petitella in 2020, so you will still see the older names on many labels. Our Rummy Nose Tetra and Brilliant Rummy Nose Tetra are sold as Petitella bleheri. This guide covers these tetras.
• Rummynose Rasbora (not a tetra): Rummynose Rasbora (Sawbwa resplendens), also sold as the Sawbwa Barb or Asian Rummynose, is a small cyprinid found only in Inle Lake, Myanmar. It stays around 1.4 inches (3.5 cm) and prefers cooler water of about 64°–72°F (18°–22°C).

Because the Rummy Nose Tetra needs warm water of 76°–82°F while the Rummynose Rasbora does best below 72°F, the two are not interchangeable and are not an ideal pairing in the same tank.

Rummy Nose Tetras Overview

Popular among the fish keeper community, Rummy Nose Tetra (Petitella bleheri) are known for their unique appearance, strong swimming ability, outgoing personality, yet peaceful disposition. They are commonly known as Red Nose Tetra or Firehead Tetra due to their unique appearance. Three parts of their body reflect three different patterns: a bright red nose, a silver body, and a horizontally striped black-and-white tail. To those who love amazing displays inside their tank, Rummy Nose Tetras will be a great choice as their features really make them stand out in the aquarium tank, especially when they swim together.

Fact: Rummy Nose Tetra is gifted with a sleek, torpedo-shaped body that reaches about 2 inches (5 cm) as an adult, which makes them a strong swimmer compared to other fish.

Native to South America, Petitella bleheri is found farther inland and has a narrow range along the Rio Negro and Rio Meta basins in Brazil and Colombia. These waters are soft, mineral-poor, and stained with tannins. Hence, it is better for Rummy nose fish if you keep them in an aquarium sharing similar conditions, slightly acidic and soft water with a low calcium level (they do poorly in hard, calcium-rich water). Putting some aquarium decor, such as soft, sandy substrates, driftwood, rocks, and caves, is also recommended. Rummy Nose Tetra loves live plants, but it also loves having an open swimming space. You can consider placing live aquatic plants on the corners of your fish tank to let them have a large area in between to swim and socialize. Some aquatic plants that are suitable for them include Java Fern and Amazon Sword.

Create an Ideal Rummy Nose Tetras Tank

Though these freshwater fish are popular and often recommended for beginners, they are not the easiest fish to care for. However, a healthy Rummy Nose Tetra may live around 5–8 years if they are well cared for. Rummy Nose Tetras are very sensitive to their water parameters and quality. As such, you should notice that:

• Your new tank must be well-cycled before introducing the fish. If you are not familiar with this process, you can read our article on How to Cycle a Fish Tank.
• Even if your aquarium is mature, it requires regular testing and maintenance to ensure toxins stay at undetectable levels.
• Do not let your water parameters fluctuate. Try to keep them balanced. You can refer to the following for setting up your tank.

Tank Size

As they are tight-schooling fish, keep them in groups of at least 8–10. To allow them to swim freely, you need to provide them with enough horizontal swimming area. A 20-gallon aquarium is a practical minimum for a school of 8–10 Rummy Nose Tetras, and a longer tank of 30 gallons or more lets you keep a larger, more impressive school.

Temperature

Rummy Nose Tetras prefer warm water. They will thrive in the temperature of 76° - 82°F (24° - 28°C), so use a reliable aquarium heater and avoid sudden swings. Tetra Fish are outgoing species, but if you happen to find them hiding or staying near vegetation, it may be because of bright light. They do not enjoy bright light and even get stressed if they are regularly exposed to it. If your tank is in this situation, try to adjust the aquarium light or shade their swimming space with floating plants instead.

Recommended Water Parameter

• Ammonia and Nitrite: 0 ppm
• Nitrate: less than 20 ppm
• Hardness: 1 - 8 dGH (soft water is preferable)
• pH: 5.5 - 7.0 (more acidic water is preferable)

Filtration

An efficient aquarium filter with gentle to moderate flow is advisable since Rummy Nose Tetras can be sensitive to ammonia and nitrates in the water. External filters tend to be especially effective.

Water Change

Weekly water changes are encouraged. They help keep the water clean and stable and prevent your Rummy Nose Tetras from getting stressed.

What Do Rummy Nose Tetras Eat?

As mentioned above, diet is important to keep your Rummy Nose Tetras healthy. Since they are omnivores, they can feed on both meaty fish food and bits of plant matter and larvae. High-quality flake food and micro pellets are highly recommended, as these are designed to contain all the necessary nutrients needed for your Rummys. You can also offer frozen foods such as bloodworms, brine shrimp, and daphnia as a treat. Feed them 1–2 times a day, offering only what they can finish in 1–2 minutes, and remove any leftovers so they don’t decay in your tank.

Rummy Nose Tetra Tank Mates

Your Rummy Nose Tetras are best known for their peaceful disposition and tend to get on well with lots of other tropical fish species, except for boisterous and aggressive fishes such as large cichlids. Peaceful dwarf cichlids like Rams and Apistogramma are generally fine. You may often see Rummys hanging out around the middle of the tank. As such, in addition to small and peaceful fish, they can also get along well with bottom dwellers. Choose tank mates that also enjoy warm, soft water. Some names are good options for your consideration.

• Danios, Rasboras such as Harlequin Rasbora, and other types of Tetras (skip the cool-water Rummynose Rasbora described above)
• Hatchetfish
• Peaceful Cherry and Gold Barbs
• Dwarf Gourami and Rainbowfish
• The Siamese Algae Eater in larger tanks
• Bottom feeders like Kuhli Loaches, Corydoras, and Upside-Down Catfish

Rummy Nose Tetra Breeding

Rummy Nose Tetras are egg scatterers, and breeding them at home is possible but challenging. To encourage breeding, set up a separate breeding tank that:

• Is filled with very soft, acidic water;
• Is well-planted with fine-leaved plants or spawning mops, where the fish scatter their adhesive eggs;
• Is kept warm, around 84°F (~ 29°C), with dim lighting; and
• Has gentle, clean filtration such as a sponge filter, because Rummys will not spawn in poor water.

When spawning happens, the pair scatters eggs among the plants. Adults will eat their own eggs, so move them back to the main tank once spawning is finished. The eggs hatch within a few days depending on temperature, and the fry become free-swimming a day or two later after absorbing their yolk sacs. Feed them infusoria or specialized fry foods until they are large enough to accept the same diet as adults. Though the process sounds simple, it is hard for non-professionals to breed Rummys for a few reasons:

Rummy Nose Tetras are difficult to sex, although during the breeding season, the females may be slightly rounder than the males. However, this difference is hard to distinguish by bare eyes. The best solution is to get confirmation from a specialist breeder if you really want to experience the breeding process yourself.

Even if you have a good, qualified group of males and females, mating may fail if your tank is not well-balanced. Rummys are very sensitive, even to a slight change in water conditions. If the adult Rummy will not tolerate any fluctuations in temperature, parameters, or water quality, neither will their fry. If you wish the young Rummys thrive, you must carefully maintain your tank to meet their living conditions.

Rummy Nose Tetras Common Diseases

Illness is hard to avoid completely, especially when fish live in poor water and feed on poor nutrition. Rummy Nose Tetras are susceptible to Ich (white spots that develop all over the body) and Dropsy (fluid build-up that makes the body swell, usually a sign of internal infection). You may catch their problems early by looking at their red noses, which often turn pale in bad water conditions. To treat these problems, test and clean your tank first to see if there is any improvement. If your fish are not showing any signs of recovery, you may consider an appropriate aquarium treatment. Remember to quarantine new fish before adding them to your display tank. At Splashy Fish, every fish is quarantined before it is listed for sale.

Conclusion

Rummy Nose Tetras are an interesting species in both appearance and care. They will challenge you at first; however, once you’ve learnt how to take care of them properly, you will find they are worth investing in for your aquarium.

If you're looking for a Rummy Nose Tetra for sale or the line-bred Brilliant Rummy Nose Tetra, visit our tropical fish store or browse all Tetras for sale and schooling fish. Every fish is quarantined before listing, packed carefully, and shipped live within the USA from our Virginia-based fish store, backed by our live-arrival guarantee. At Splashy Fish, we offer not only aquarium fish for sale, freshwater shrimp for sale, but also aquatic plants for sale and other aquarium supplies.

Rummy Nose Tetra Care Frequently Asked Questions (FAQs)

Is the Rummy Nose Tetra the same as the Rummynose Rasbora?

No. The Rummy Nose Tetra (Petitella bleheri and its close relatives) is a South American tetra that needs warm, soft, acidic water around 76–82°F. The Rummynose Rasbora (Sawbwa resplendens) is a small cyprinid from Inle Lake in Myanmar that prefers cooler water around 64–72°F. They share a nickname, not care requirements.

How many Rummy Nose Tetras should be kept together?

Keep at least 8–10 Rummy Nose Tetras together, and more if your tank allows. Larger schools swim in tighter formation, show stronger red coloration, and are less stressed than small groups.

What temperature do Rummy Nose Tetras need?

Rummy Nose Tetras do best at 76–82°F (24–28°C) in soft, slightly acidic water with a pH of 5.5–7.0. Use a reliable aquarium heater and avoid sudden temperature swings.

How long do Rummy Nose Tetras live?

With stable, clean water and a varied diet, Rummy Nose Tetras typically live about 5–8 years.

Do Rummy Nose Tetra jump?

Yes, Rummy Nose Tetras can jump, especially when stressed or startled. Sudden light changes, poor water quality, aggressive tank mates, or chasing during feeding can cause them to leap from the tank. Because they are strong, fast swimmers, it’s highly recommended to use a tight-fitting aquarium lid or cover, especially in open-top tanks.

How often should I feed Rummy Nose Tetra?

Rummy Nose Tetras should be fed 1–2 times per day in small portions they can finish within 1–2 minutes. A balanced diet of high-quality flakes or micro pellets, supplemented with frozen foods like bloodworms or daphnia, keeps them healthy and maintains their bright red coloration. Overfeeding should be avoided, as they are sensitive to water quality, and excess food can quickly cause ammonia spikes.

Can Rummy Nose Tetra live without CO2?

Yes, Rummy Nose Tetras can live perfectly well without CO₂ injection. CO₂ is beneficial for plant growth, not for the fish themselves. As long as the tank has stable water parameters, good filtration, and adequate oxygenation, Rummy Nose Tetras will thrive in both low-tech and high-tech planted aquariums. If CO₂ is used, it must be carefully regulated to avoid stressing the fish.