Apparently from what I've read it seems to happen in cycles. I have personally lost quite a few small colonies. Stress seems to be a big factor. Most of the colonies I lost were heavily fragged prior to the pox developing. I've also noticed that by quarantining the infected colonies and letting the cycle run its course the surviving polyps have flourished. I have tried FW dips and lugols to no complete success. On RC there is a treament using FuranII taht seems to be very effective, but I haven't used it before. All my zoa colonies seem to be pox free at the moment (Fingers crossed). The pox is easily ID by the presence of small "wart"-like bumps on the outside of the polyp. Very noticeable when the polyp is closed. It also seems to only affect zoas and not palys for some reason. Hope this rant helps.
Is Reef Madness Catchy???