Well I've been considering popping discus into my 150 but I've had a thing for these fish.. Pop some fronts and some others in there with them. Davesfish has some but I personally am an inexperienced owner with them so I felt I would ask before getting my feet "wet" so to speak. There are two different genus.. Altolamprologus compressiceps or calvus. I am wondering if either are more or less aggressive to other tank mates (more or less). And I was considering getting multiple fish, multiple colors.. My ongoing theories with any cichlid is more is better for aggression purposes.. I like a large fish population so I am considering several of these guys, some fronts and some other omni's... Basically some haps and peacocks but was also considering a semi large school of rock dwellers.