Grah the great· Registered
What is the floorplan on the tank? If it's less than 30" long you are basically limited to shell dwellers if you want rift lake cichlids, but if it's at least that long, a small tang community with a small, docile shellie on one end with a lot of shells and a small, docile rock dweller on the other end with a rock pile would likely work. 30" long tanks are also big enough for single species colonies of several mbuna species (I.E P. Saulosi, L. Chisumulae) and at least 1 Victorian hap (Haplochromis 'ruby green'). The tangs would probably tolerate plants if you could get around the shellie's habit of digging, but a mbuna or ruby green setup may eat the plants...you'll have better luck in both cases if you have plants before fish.