I have a female betta, Butterfinger, who is extremely healthy, but she's also very aggresive. :-? I tried putting another female in my 2 gallon bowl, but she wouldn't stop attacking her. I'm thinking it might be a short finned male. Anyway, I got a bigger tank (10 gal.) and put her in there to begin. I then got 3 rainbow fish and she started attacking them like crazy so I returned her to her fish bowl. The rainbow fish eventually died because they were sick to begin with, a bad batch at the store. Now I have 3 healthy cherry barbs and am planning on getting more. I really want to put her back in the tank because she loved it, but I'm a bit nervous. Any suggestions?