Hi, I have been having problem with some of my fish. I have lost five fish in the past week.Three of them had what looked like a swallen red eye. I also lost two other fish, both had cuts and fins ripped off. Does anyone know what could have caused this? I have not introduced any new fish into the aquarium so i dought that a fish could have done this. I have never had trouble with my aquarium before. Any help would be greatly appreciated. Thanks