Betta compatibility guide. 8 compatible tankmates + 5 species to avoid + temperament + size + water-chemistry guidance.
Peaceful bottom-dweller, ignores betta entirely. Group of 6+.
Tiny algae eater, peaceful, group of 4-6.
Eel-like, hides during the day, peaceful with bettas.
Tiny + peaceful schoolers. School of 8+ in 10g+.
Hardy + peaceful, schools of 6+ at the top of the tank.
Algae eater, completely safe with bettas.
Risky - some bettas eat them. Heavily plant the tank for hiding.
Larger than cherry, less likely to be eaten by betta.
Notorious fin-nippers; will shred betta fins.
Bettas kill other male bettas. Sorority tanks (females only) work in 20g+.
Same family as bettas; trigger aggression.
Outgrow betta; aggressive when paired up.
Aggressive in their own right; mismatch in temperament.
Use the stocking calculator to verify your specific plan. Browse stocking ideas by tank size for proven setups, or read the Betta care guide for full husbandry details.
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