tuxedo urchinHi,
I have a 20 gallon high tank. There are 2 corals, a duncan and a zoanthid, and dragons breath macro algea, and a cleaner shrimp, that's all that's in there are there any fish, invertebrates, or anything that controls it. I get you can pull it out of the sand, but when it's in the rocks it's very hard to get out. So any eaters or anything that gets rid of it, thanks.