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I have got 8 bettas and the ones I keep in the community tanks are very thin and wiry and have lost parts of their tails to the other fish.I never catch anybody doing the nipping, but just find the betta without tails in the morning.the other thing I have found out is that the current in a tank ( from the filter) takes a lot out of the bettas.
bettas actually prefer calmer waters and mine also hide behind the filter tubes where there is no current.
also the bettas in the community tanks are considerably smaller than the ones i keep in their own separate jars.
Check it out for yourself!
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