im not one to recommend one, give it a month or two for that, but, on day three, he is more chill then he was on day two. Today he has been hanging out covered in the sand bed, unless he sees me come up to the tank at which point he comes up to the side to check me out. Very very hardy eater. I feed my tank 3 times a day, and ever time i put food in the tank he goes ballistic. I am pretty sure he would knock out any snails or crabs you might have so that might be a problem. So far he has left my clams, fish and corals completely alone.