Should I keep it?

I picked up a great mushroom rock with tons of coraline, featherdusters, and mushrooms.  I was told that it might have bristleworm (not a bad thing I am told) and rock anenomies (I thought looked cool).  I am now finding out that the rock anenomies may not be a good thing, and I noticed an odd looking black worm (all black with tenacles for a head.  about 3/4").  I know I can (and should have) soak the rock in lugol's, but that will most likley kill the featherdusters, and not do anything to the rock anenomies.  Since most of the rock in my tank is still pretty new it appears everything (I know appearances can be decieving) is stay on that one rock right now.  Am I better off removing the rock, or should I try to treat the problems?

I believe everything will stay in the rock if I remove it.