best thing ive had that eats everything would be the TIGER CONCH.... the turbo snails are great for the rock work and the glass but they seem to never hit the sand . the conch is a sand sifter, plus it eats the algae on the sand and even climbs my rock work (not too high, obviously). i have two and when they are tired they bury themselves in the sand as on last sand sifting act before bed.