ok i set up alittle 15gal salt water tank just for live rock, mushrooms, xenias, crabs and polyps. now the live rock i received had bristle worms in it and i was wondering is there anyway of getting rid of them. like water treatment or some type of crab? i have a 6 striped wrasse in the tank but im not sure he is helping. i've read about the 2 liter bottle trap but i am not so sure i want to try that just yet. does anyone have any ideas?