Any water conditioner going into my tank will cause the CSS 220 and AquaC Remora to go crazy. I would shut off any skimmer for a couple of hours and after you turn it back on monitor it for a bit if you have HOB type of skimmer.
About 3 weeks ago my Hippo came down with white spots on its boby but it was eating well and everything seem normal. A week went by the Mandarin came down with very small white spots and in the begining I thought it was sand but within 2 days it died along with a Yel Jawfish. I've about 130lbs of LRs and catching those little guys wasn't much of an option and I decided to administer Stop Parasite which is supposed to be reef-safe twice a day for 5 days and I'm in the 4th day now and everything in the tank is looking fine, all inver, shroom, polyp rocks are normal. I'll tell putting that much chemical in there mades me nervous but the fishes weren't looking good and I'd to do something. There is another thrd here that someone is medicating the fish food for 2-3 wks and he/she is about half way through and I would love to hear their end result.
Good luck with your Coral Beauty!