Betta nano

Save the Little Fish demo · Nano, 5–10 gal · calm, like a pond or swamp · running 437 days · shared October 2026

Still water, lots of plants, and tank mates too small and peaceful to bother a betta's fins.

Looks good

The fish

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Gouramis & bettas · Betta

Lone male. Males fight. Keep one, or give each his own space.

Betta splendens

Rice paddies and marshes of Thailand · swamp or paddy

Lone male. Males fight. Keep one, or give each his own space.

Long fins. Fin nippers will pick on it.

Photo: ErgoSum88, Public domain

× 1

Builds a bubble nest under the floating plants.

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Tetras · HyphessobryconStaple

Hyphessobrycon amandae

Rio Araguaia basin, Brazil · river

Photo: Cedricguppy - Loury Cédric, CC BY-SA 4.0

× 8

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Corydoras · CorydorasStaple

Corydoras pygmaeus

Rio Madeira basin, Brazil · river

Photo: AquaTuer, CC BY-SA 4.0

× 8

Shared range 24–26°C
Every species is comfortable in this range.
No hybrid risk
No two species here can cross, so any fry that turn up are pure.
Stocking 75% of capacity
A rough estimate based on adult body size and tank volume.
Fish at every level
Something at the top, in mid-water and on the bottom, so the whole tank looks alive.
Tank size is a guess
Size and stocking checks use a typical tank of the size you picked. Add the real length and volume for a sharper answer.
Some values are estimates
Care data for Betta (Siamese fighting fish), Ember tetra, Pygmy corydoras is estimated or taken from the genus, not yet checked against a source.