Demo
Save the Little Fish demo · Large, 55–75 gal · gentle current, like a stream · running 593 days · shared October 2026
A bright, modern 55-gallon: clean lines, a strong LED, a lawn of green plants and a school of fish in every colour. Everything here is hardy, easy to feed and peaceful, so it's a great first tank that still stops people in their tracks.
Gymnocorymbus ternetzi
Paraguay and Guaporé basins · river
Fin nipper. Keep it away from long-finned fish.
Photo: emptyvi, CC BY-SA 3.0
× 10
The colour-bred ones glow under the blue night light. Kept in a big group, they leave everyone else alone.
Melanotaenia praecox
Mamberamo River basin, New Guinea · stream
Photo: Raimond Spekking, CC BY-SA 4.0
× 6
The males flash yellow fins at each other every morning.
Trichogaster chuna
Ponds and ditches of India and Bangladesh · pond
Photo: Vincent Lim Show Chen, CC BY-SA 2.0
× 2
A calm pair that hangs out under the floating plants.
Corydoras aeneus
Widespread in South America · stream
Photo: Andrew Keller, CC0
× 6
Every species is comfortable in this range.
No two species here can cross, so any fry that turn up are pure.
A rough estimate based on adult body size and tank volume.
Something at the top, in mid-water and on the bottom, so the whole tank looks alive.
Size and stocking checks use a typical tank of the size you picked. Add the real length and volume for a sharper answer.
Care data for Black skirt tetra, Bronze corydoras, Dwarf neon rainbowfish, Honey gourami is estimated or taken from the genus, not yet checked against a source.
