I'm sorry that I didn't take a pre treatment picture but this was a last ditch effort. I had a nice colony of Zoa's that closed up and hadn't opened for 4-6 weeks. White fungus was around the base of the polyps at numerous sites. I read on this forum that survival was limited at this point so I decided to try an anti- fungal medication since there was little to lose. I used API's Fungus Cure (Victora Green plus Acriflavin) mixed at 2x the concentration recommended for fish. I placed the Zoa colony in a small bucket with the medication and a tiny pump for 30 minutes. I then rinsed the colony in clean tank water and returned the colony to the tank. Literally, with 48 hours, about 80% of the polyps re-opened and have been open for the 6 weeks since the treatment. There has been no return of the fungus. This is only a single case and not a "study", but if you have a Zoa colony that is "on the ropes" give it a try. Thank you.