from his site about getting these things off your corals:
"Just before MACNA during the month of September, I treated the coral with Fluke tabs instead of Betadine. The product works at getting the AEFW to let go, which I turkey basted off the coral in the treatment tank. I used two tablets in two gallons of water, and put a powerhead in the solution to keep the product in suspension. It looks like snow in the medicated water, and will settle on the coral. This caused no harm at all. After about 20 minutes in this solution, I blew off the coral again, took it out of the treatment tank and dumped out the water. This was replaced with tank water, and the coral was put in that for another 20 minute bath to remove any toxins and to observe for any stragglers. "