I had this nice little developing colony, not a real fancy coral, but I liked it. Noticed a branch had started tissue recession, took it out, dipped in revive and decided to watch it for a day or two. Well it didn’t get better so I decided to frag it at least I would be able to save and regrow, then after a day or two those frags started the same thing, took them and dipped in mild solution of Lugol’s placed in frag tank under less intense light continued to watch. Within a week all dead. (Refused to live)No ther issues with any other coral nearby, but a couple weeks before had the same thing happen to a coral at the other end of the tank that did just fine after cutting out the affected branch( wanted to live). Wish I had taken pics, sps can be very frustrating at times