In my area it seems the only live rocl we can get is INFESTED with either bristle worms or gorilla crabs, and a few things we have called "twitch" that look like a type of mantis shrimp. I was wondering if there was a way to get rid of these things safely in the future without damaging other livestock/coral on the rock...how much damage will freshwater do? what about something called coral rx? I have heard about pantyhose/knee highs for bristle worms...we tried that, should we use fish net hose so they actually get stuck? lol. I like supporting my lfs and their product...just not the hitch hikers lol.