Carlito is the second betta I had in my 20 gall community tank. Mr. Fish, the first one, would attack everything. My personal opinion, contradictory to what others think, was that Mr. Fish had the tank to himself for a couple weeks which I think gave him a little god complex.
I think it does depend on the betta. Also Carlito is a smaller betta then Mr. Fish was. That might help their temperment as well if they aren't so much bigger then the other fish. Of course all this is theory, but I know it's possible more often then not. Every LFS in town including the bigger chains like PetCo and PetSmart all keep bettas in with other fish. I've only once ever seen aggressive behavior at the fish store.
In closing I want to say I have no doubt that if Carlito ever actually caught one of my cardinals that he would kill it. However being a much faster fish the chances are slim and in time the fish will get more comfortable with one another.
Curtis
I think it does depend on the betta. Also Carlito is a smaller betta then Mr. Fish was. That might help their temperment as well if they aren't so much bigger then the other fish. Of course all this is theory, but I know it's possible more often then not. Every LFS in town including the bigger chains like PetCo and PetSmart all keep bettas in with other fish. I've only once ever seen aggressive behavior at the fish store.
In closing I want to say I have no doubt that if Carlito ever actually caught one of my cardinals that he would kill it. However being a much faster fish the chances are slim and in time the fish will get more comfortable with one another.
Curtis