Yes, MORE rockwork and caves, will make the fish happier ! We bought a new home and will be moving out of this rental house next month so I am changing my 100 Gallon F/W planted tropical to an african cichlid tank and starting over with this same tank that has had 3 complete re-starts in about 18 years. The water is about a 7.8 plus PH out of the tap, so perfect for africans. Now with the new home, i don't have to worry about having to move again so I can do a more elaborate set up this time !!