I have a 55g community tank. I have a few fish in there I know could be the culprit. Somebody completely ravaged my betta. There is a Krib cichlid in there, there are 5 golden barbs as well. I've seen the krib nip at fish but would he go this far? I know the barbs have a rude reputation for fin nipping. He was fine this morning when I left, destroyed when I got home this evening. Who would you suspect did it? thanks for the help!