Thanks all,Rocks are Grey Yorkstone borrowed from local beech. Caves are overrated in the many yrs ive been keeping wild Rifts as long as a few hideouts for holding females and fry. My tip is grow plenty of alge for Mbuna and they spend many hrs grazing of rocks instead of fighting I feed 3x small feeds daily and carry out 80% weekly water changes to keep Nitrates very low. Only have 4 species with 2 being large groups either 1m or 3m with many females. Pick species that don't look alike and that helps with aggression or any hybrids.