Rummynose tetra
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 parameters
| Temperature | 24 – 27 °C |
|---|---|
| pH | 5.5 – 7 |
| Carbonate hardness (KH) | 1 – 8 °dKH |
| General hardness (GH) | 1 – 8 °dGH |
Tank & stocking
| Minimum tank volume | 90 L |
|---|---|
| Volume budget per individual | 8 L — adds up with tank-mates |
| Minimum group size | 10 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.
Fish from the same biotope
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