I inherited a 6-7 inch peacock and decided to put it in with my south central cichlids. Things have been fine for around 9 months then After work I went to my man cave and saw my 6-7 inch full grown male salvini dead on the bottom of the tank. Water is good, and all fish are great eaters. The peacock now seems to run the tank and every one else seems scared of it. Not sure what else could have happened and I haven't lost fish in a long time. Opinions.?