I just love the way those fish look! What are your thoughts on adding 1M/3F (or fewer?) to a 55g already stocked with 7 Msobo, 6 Yellow Lab, 2 Acei, and 1 unknown (hybrid) Labeotropheus of some sort? The labeotropheus seems dominant, i.e., is the biggest, chases other fish, but only briefly, and only when he's waiting to be fed. The rest of the time, he's hiding. No plans to breed/sell offspring from anything. Tank has lots of rocks and hiding places.