Rummy-nose Tetra
Hemigrammus rhodostomus is one of the true rummy-nose tetras, a characin of the family Characidae native to the lower Amazon basin and coastal rivers of Brazil. It closely resembles its relatives, with a bright red head, silvery flanks, and a horizontally banded black-and-white caudal fin. A peaceful and gregarious species, it schools tightly and should be kept in groups of eight or more. It suits community aquariums with other calm species and is a classic choice for planted, biotope-style tanks. The red on its snout fades when the fish is stressed or the water quality declines, serving as a useful health gauge. It prefers soft, acidic, warm water with gentle current and plenty of planting alongside open swimming areas. It eats small prepared foods, micro-pellets, and frozen fare such as daphnia and brine shrimp. Captive breeding is achievable in dedicated soft-water setups but demands careful attention to water chemistry.
Water parameters
| Temperature | 22 – 27 °C |
|---|---|
| pH | 5.5 – 7 |
| Carbonate hardness (KH) | 1 – 6 °dKH |
| General hardness (GH) | 2 – 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 Rummy-nose Tetra need?
Provide at least 90 litres for a small group to keep Rummy-nose Tetra in good conditions.
What water parameters does Rummy-nose Tetra need?
A temperature of 22–27 °C, pH 5.5–7.
Is Rummy-nose Tetra peaceful or aggressive?
Its temperament is peaceful.
What does Rummy-nose Tetra eat?
Its diet: omnivore.
How many Rummy-nose Tetra should be kept together?
It is a social species: keep a group of at least 10.
How big does Rummy-nose Tetra get?
Around 5 cm as an adult.
Is Rummy-nose Tetra suitable for beginners?
Care level: intermediate.
Planning a tank with Rummy-nose 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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