I have a orange diamond goby, sand snails and a sand star. By far the goby does the most, he never stops sifting. The only issue I have with him is where he has decided to sleep, he buries the hole during the day and kicks the sand out at night. I have a mini nem and a mushroom on that rock, the nem seems ok but the mushroom relocated as it was constantly under sand. I can't keep any corals in front of that rock but I'm ok with that. He doesn't kick up sand anywhere and IMO was the best addition for keeping the sand clean.
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