Good thread with lots of information for any bid interested on Malagasy cichlids regardless of level of experience. I would like to add my own twist.
I try to avoid Paretroplus that are considered lacustrine species because I am concerned about hybridization so I keep dambabe, maculatus and menarambo in separate tanks. I have had kieneri combined with menarambo and dambabe and they tolerate each other. I mixed them once with nourissatti once and they were a little more belligerent thought both species occur naturally but in the confines of an aquarium, natural rules don't apply
.
I am keeping damii and dambabe and also damii and Etroplus canarensis. The latter mix seems to work as long as the damii stay small and I hope they won't tear the canarensis to pieces once the damii are over 16 inches.
I have mixed oligoacanthus and grandidieri with any and all species and these substrate spawners do well too. The only concern is that grandidieri can get huge and will eat small fish from time to time. So I keep killifish of the genus Pachypanchax with canarensis and other Paretroplus as long as they are raised together.
I am keeping maculatus with exCichlasoma salvini, Paratheraps breidohri, and Pterochromis congicus with good results.
The only issues I have ran into is mixing Paratilapia with Paretroplus, Paratilapia tends to stress the other fish into not breeding, however, I have placed a Paratilapia into a tank of fully grown menarambo only to have the newby torn to pieces.
So best rules to follow is to raise the fish together, particularly important for extreme species like Paretroplus nourissatti.