Danios would nip his fins too. You might get the occasional tetra nipping the fins, but I'd be much more concerned with the Danios. I have Bettas in community tanks, they don't really mess with anyone else, although when I had a Betta with a pair of Rams in the 10 gal there was quite a bit of flaring, chasing and displaying.
Stacey
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55gal medium planted. School of rummynoses, school of green neons, chocolate gourami, a pair of Bolivian rams, otos and SAEs.
MB7 planted, one Oto, and 3 Amano shrimp that ate all the tiny fish and now live ALONE.
Marine tanks- 29g reef, MB7 reef, 20g algae farm.
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