I have purple mushrooms that are growing, multiplying, and spreading out on rocks throughout the tank. They have started to damage corals such as favia & candy canes. I would like to remove the mushrooms, but not destroy all my my live rock in the process. I searched Reef Central, and a couple of people suggested removing the rock from the water and using a hobby torch selectively to cook the mushrooms. What is the best way to remove mushrooms that have gone wild?