I'm thinking about trying to add perhaps a half dozen each of N.leleupi and N.calvus to a tank that already contains a half dozen each of P.polits and C.afra..Let me preface this by mentioning a couple of things,yes I am aware that I am planning on mixing mbuna with Tanganyikans and I am aware of the diet requirements of each.I feed my fish prepared foods exclusively so bloat for the mbuna will not be an issue.Also the fish in the tank now are all juveniles, an inch and a half to 2 and 1/2 inches in size.They are in a six foot sixty gallon tank with an abundance of rockwork.I am planning on aquiring the calvus and leleupi atleast an inch bigger than the mbuna.My thinking is the size difference may temper the difference in aggression levels of these fishes?I'm interested in hearing from people who have attempted something similar.Stories of successes and failures are welcome as well as any tips.Thanks in advance for any and all input.