I have a 5' 125 gal tank with a oscar, pike, green terror, jack dempsy. my pink convict and jack dempsy kept having babys so i took the pink convict out and i had a jaguar that was killed. My question is what other fish could go in this tank or is it about maxed out. Its all mellow now i think everyone in there are friends now. I just want somthing new. Should I start a new tank?