Galaxy Koi Betta tank mates
Betta splendens 'Galaxy Koi'
5 rated pairings from the Galaxy Koi Betta care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Galaxy Koi Betta needs at least 5 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
2 · Compatible with normal care — watch space and numbers.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful bottom-dweller that won't compete for food or space; ignores betta displays
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Slow-moving and non-threatening; bettas rarely attack snails; helps with algae control
Use caution
2 · Works in the right setup; read the note before combining.
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, fast-moving schoolers that may trigger aggression; only in heavily planted 10+ gallon tanks
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Similar temperament and labyrinth breathing may cause conflict; requires ample space and hiding spots
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.