BTWjust thought they were vegetarians/algae eaters. interesting.
in the reef tank it was snails, cleaner crabs, starfish and few of the fish species would clean some of it up, but the reef tanks had to be kept very nutrient poor anyways so not much could over grow the corals/coraline algaes.BTW
Very few aquarium fish will truly cleanup algae. It's mostly a gimmick for lazy people & to sell more fish. They may nibble on it here n there, but will never clean for you. Maybe if starved, but otherwise, nope.