so Im quite sure that my aunt is getting my brother a 55 gallon tank now for his graduation. If so, he just wants oscars, he likes how theyre mean and stuff like that. I know that oscars are supposed to be kept in a 70+ gallon tank, but would they be okay in a 55 gallon tank? If so, he'd probly only be able to have just the one right? and how long would it live in there before it gets to big for the tank. Also would an angel fish and bala shark be ok with it if there can be a few more fish in the tank?