Aqua-Pedia 🐠 Shared tanks
🌐 English
Fish

Rummynose tetra

Hemigrammus bleheri
French name : Tétra nez rouge

The rummynose tetra is a slender characin of the family Characidae, native to the lower Amazon and Rio Negro basins in Brazil. It is prized for its striking pattern: a deep red to crimson head, a silvery body, and a bold black-and-white striped tail. This particular species (often sold as the true or Brilliant rummynose) is noted for the intensity of its red nose. It is a peaceful, highly social fish that forms exceptionally tight schools, making it a favorite for aquascaped tanks. It must be kept in groups of at least eight, and larger shoals produce the most impressive synchronized swimming. The red coloration also acts as a sensitive indicator of water quality. It needs stable, clean, soft and slightly acidic water, as it is sensitive to poor conditions. A planted tank with open swimming space and peaceful tankmates is ideal. It accepts small flakes and frozen foods. Breeding requires very soft, acidic water and is considered moderately difficult.

Water
Freshwater
Origin
Lower Amazon and Rio Negro, Brazil
Adult size
5 cm
Diet
Omnivore
Temperament
Peaceful
Difficulty
Intermediate
Keep in group of
10+
Rummynose tetra (Hemigrammus bleheri)
Illustration

Water parameters

Temperature24 – 27 °C
pH5.5 – 7
Carbonate hardness (KH)1 – 8 °dKH
General hardness (GH)1 – 8 °dGH

Tank & stocking

Minimum tank volume90 L
Volume budget per individual 8 L — adds up with tank-mates
Minimum group size10 individuals (shoaling)

“Minimum tank volume” is a reasonable floor, not an absolute limit. The per-individual budget is used by the Aqua app to estimate how heavily a tank is stocked.

Frequently asked questions

What size aquarium does Rummynose tetra need?

Provide at least 90 litres for a small group to keep Rummynose tetra in good conditions.

What water parameters does Rummynose tetra need?

A temperature of 24–27 °C, pH 5.5–7.

Is Rummynose tetra peaceful or aggressive?

Its temperament is peaceful.

What does Rummynose tetra eat?

Its diet: omnivore.

How many Rummynose tetra should be kept together?

It is a social species: keep a group of at least 10.

How big does Rummynose tetra get?

Around 5 cm as an adult.

Is Rummynose tetra suitable for beginners?

Care level: intermediate.

Planning a tank with Rummynose tetra?

AquaTender turns these parameters into live advice: it checks whether your tank is big enough, how heavily it's stocked, and whether your fish are compatible — then tracks water tests, photos and maintenance for you.

➕ Add Rummynose tetra to my tank Discover AquaTender
« Add to my tank » opens AquaTender — sign in (free) and pick your aquarium.

Fish from the same biotope

Report an error on this page

Care data is community-assisted. Spotted something wrong? Let us know — it won't change the page instantly, but it goes to moderation.

Care data is generated and manually reviewed; always cross-check before major decisions. ← Back to the encyclopedia