I set up a 55 gallon tanganyika tank. Plenty of rock work and shells. Right now I have 3 black calvus that are just about an inch each and 5 leleupi at the same size. I want to know what others species can coexist and how many other species can I do. I am definitely interested in gold occellatus or multies or maybe both, but just looking for suggestions as this is my first try with Africans. Thanks