Western Rainbowfish tank mates
Melanotaenia australis
6 rated pairings from the Western Rainbowfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Western Rainbowfish needs at least 30 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Similar size, peaceful temperament, and mid-water swimming zone; compatible water parameters
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Peaceful schooling fish with overlapping pH/temperature range and similar size
Boesemani Rainbowfish
Melanotaenia boesemani
30 gal min · 4.5" adult · Peaceful
Closely related species with identical care requirements; compatible schooling behavior
Good matches
2 · Compatible with normal care — watch space and numbers.Sterbai Corydoras
Corydoras sterbai
20 gal min · 2.5" adult · Peaceful
Bottom-dweller that doesn't compete for space; tolerates the same water conditions
Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Peaceful algae eater that occupies different tank zone; hardy and compatible with rainbowfish
Use caution
1 · Works in the right setup; read the note before combining.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.