I think I have a few bettas that have a problem about not liking each other. They think they are suppose to get along. They were in the breeder tank to breed but I think they got used to each other cause they never did so I put gravel back in one of them but haven't had a chance to put it in the 10 yet. Here they are living together and have been for the last three weeks, lol.
this is red and sasha, next is twilight and america.