I have been looking for a fish or two that is sps safe and doesn't jump. I have a 24 gallon aquapod with a metal halide so it will be open topped. I would like it to be hermit crab and snail safe but if not they can be moved to another tank. I have checked out the carpet surfers like firefish, wrasses, hawkfish. The coral munchers like blennies and gobies some of them like to carpet surf as well. My sand bed is about 2 inches deep so nothing like a watchman or jawfish. I have thought of 2 damsels but know they can get mean at anytime.