I have just added a betta to a 5.5 gallon tank with a couple dwarf rainbows and i just notised that the betta's fins are looking frayed and one even had a hole in it. This morning i found one of the rainbows chasing him and nipping at his fins. The betta seems to be just terrified and it is such a shame b/c his fins used to be so beautiful. He hides all the time and i can tell that he is not happy. I don't have anywhere to move him to and i don't have the money for another tank right now. I am thinking of getting rid of the dwarf rainbows b/c i don't really care for them anyway, and just leaving the betta with the dwarf frogs that i already have in there. Does anyone have any suggestions or comments for me that will help? Thanks so much...i really need help!