Nice tank. When they get a little bigger, i will upgrade to larger rocks, and make sure they have plenty of hiding places. Right now they are still pretty tiny though!
I like it it does look cool but you will probably be rearranging things once you move them so that would be a good time to clean underneath rocks etc... I usually rearrange things when adding new fish to the mix as well... lowers aggression. Things will get interesting when they all reach about 4 in so you'll really see how well they will all get along and go from there... my male auratus is a terror and so was my blue zebra he had to be removed once he reached 5 in got too aggressive toward the other mbunas... my male kenyi and electric yellow will fued every now and then too especially if they are going into spawning mode which is very frequent lol good luck w it!!
Oh, I also had a question: I've seen some people that come into my shop with african and SA cichlids in the same tank. I didnt think that was appropriate; anyone know?