The best way would be to chip off small pieces of the rock that the poylps are on. LR
usually chips pretty easily. The next best way is to trim them off with a razor blade or scalpel...be sure you get all of each polyp you want to remove though or they will grow back. I have a couple of rocks with parazoanthus and zoanthus growing together and it doesn't seem to cause a problem. If your zoos are the smaller variety though, the yellow poylps may shade them. If you can chip off the small pieces of rock, you might take the frags
to the LFS
and trade for some stuff you don't have.