So my friend has offered me a beautiful newly purchased 3in jewel cichild. She bought it thinking it wasn't an aggressive fish, the fish started chasing and bitting off pieces of the other fishes fins. I have a 125g with a 4in oscar, Senegal Bichir, 4in Angelfish and a 4in Pleco. I also have a 25g with just a marbled crayfish. Should I add it to any of these tanks? I'm not sure if this fish will hurt my other fishes and I would really like to have it. Do any of you guys think this is a good idea or had an success before with homing these fishes together?? Thank you.