I also have a blue cheek goby. But having a bit of issues.
He dives down, picks up sand, goes up, sifts it, dropping it all over my Live rock, mostly the lower half of the tank. Now it's not too much of a problem to me, but I'd like to know, if he drops sand like this on corals (don't have yet but going to get some soon) will it be detrimental to them?