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Tank mates and social setups

Compatibility is a risk assessment, not a list

Betta fish tank mates require individual risk assessment because a betta may still reject a generally compatible species. Aquarium size, cover, behaviour and a backup enclosure all matter.

Research and written by

Reviewed and edited by Kate Barrington

Blue betta and a small fish group housed in two visibly separate planted aquariums
Compatibility decisions require species research, adequate space and a reliable separation plan.

What a compatibility decision needs

Compare temperature, water, activity level, fin-nipping risk, territory and feeding competition rather than relying on a yes-or-no label.

Any combined setup needs observation and a practical separation plan before the animals are introduced.

Compatibility guides