i have a 55 gallon tank with about 1/2 dozen mollies and guppies, 6 cories, 6 small clown loaches, 3 synodontis occellifer, and 1 small bristlnose plecostamus. There is plent of hiding places and I've never seen any aggression between the fish. Recently, a molly had some fry. I've noticed that corys ...