I have been dealing with the irritating things as well, and the 2 part works well for the ones that are in the open but some are deep into corals or in between rocks. Has anybody noticed any affect on them with interceptor? I treated for red bugs a while back and don't seem to remember any signs of vermetid snails after that, but slowly they have gotten out of control. It seems if they are an invert the treatment would kill them, and could even be shot directly into the web. Maybe grind it up and put it in water but don't dilute it fully. I have been wanting to try it but I already had to rebuild my CUC once, and not wanting to do it again.