I have a 10 gallon saltwater aquarium - FO with live rock. I have 2 Ocelaris Clownfish, a couple of snails, 4 blue legged hermit crabs, and one cleaner shrimp. I know I can't get another fish in an aquarium that small, but wondering if it would work to add a perppermint shrimp or another clearner shimp - or is that too much. Thanks