The problem with interceptor is it will kill all your inverts (Crabs/Shrimp etc). So if you cant get them out, they are toast. make sure you do your research on how to do it. The good news is it seems to be pretty forgiving. I have never lost a single coral from treating my old tank. When people first starting using it, they went crazy with carbon and HUGE water changes etc after. I think the stuff is actually fairly harmless.