Hi! I have a 43 gallon mixed reef, and I was wondering what sort of fish I could keep that would help to sift the sand. I am aware of cucumbers and hermit crabs, both of which I'd rather not keep (Bad experiences with the crabs, seen what a cucumber can do when it 'nukes' a tank). Other fish in the tank include a percula clown, three blue-green chromis and two firefish. The sand coverage in the tank is just under 1/3. Thanks in advance!



