I have a 120-gallon reef that's been going for a year and all of the corals from open brains to pagodas to leathers, etc. are doing great. I have a rainbow of zoanthids including protos and palys which are doing great and spreading. Just one is a problem...a nice pink colony of palythoas that has some polyps that don't open. There's a bluish film on those that looks something like a cyano but not that dark reddish color - this is blue...really blue. I regularly blow around them with a turkey baster and I have them in fairly high flow, but once that blue is on a polyp it seems to lead to it's destruction and it keeps on happening, a few polyps at a time. Anyone know what this is and what to do about it??