I'm going to guess because he keeps the sand bed nice and clean

CBB, Toby puffer, filefish for aiptasia removal. Naso tang for algae removal.

My staghorn hermit crab. He eats everything off the sand bed. Also shout out to my cone shell hermit who eats hair algae like you wouldn't believe.

I would have to say my sea hare. Got rid of all my hair algae within a week.

I would say my filefish, decimated my aiptasia infestation. (well over 500!!!!)