Urchins are pretty good at it... emerald crabs(creepy looking)... and I would suggest an assortment of snails...nassarius, turbo*thumbsup2 , astrea... some hermit crabs have been known to...sally lightfoot crabs...
Just a side Q... Do you have a protein skimmer?(Must have) What do you use for water topoff? (RO/DI!!!!)
A refugium w/macro will help out keeping the nutrients down...