For an African Cichlid tank, I suggest once again a 500 to 750 Gal tank,
I would set this tank up (can't find a photo that captures the look just right) with tan S Grade 3M Color Quartz; large limestone and shale rock piles towards each end, a moderate amount of the limestones scattered around the center area.
I would then stock it with Frontosa, Ventusa, Peacocks, Electric Blues, Hongi's, Goldens, etc., etc., etc.