What helped mine were getting it in some decent flow. Dipping was useless. 2 lads at my LFS are experimenting on ways to kill them without killing the coral. Iv just learned to live with them for now. Made sure i have plenty of magnesium, some phosphates and nitrates, decent flow and left them to it. Ill take some photos tomorrow when the lights are back on. If your at your wits end id start dipping every 4-6 days. Dipping reduced the numbers for me and my final plan was going to be high strength dips every 4 -6 days for 5 weeks.
I just leave them alone now and touch wood the torches although not as happy as they could be, they are doing ok.