So after doing well for about 3/4 weeks my xenia / clove polyps have died due to unknown circumstances . I have checked all my parameters but there all fine . The questions is now that they are on a big piece of live rock with many feather dusters worms and other tube worms . Do i just leave the piece in there or take it out and try and get the dead bits off. I dont want to totally remove the piece of rock !!1