I tried to mimic Franks tank on a smaller scale and found very few other fish that were able to hold their own in a Brichardi-type mixed tank. I had Helianthus take over most any tank they were in just by sheer breeding unless your diligent in pulling out fry or trying to sex out only females in a rather monomorphic species of fish. For a long time I was able to keep Telmatochromis Temporalis shellies in a 75g tank with Brichardi.