I have never dipped my corals ever in the 7 years of reefing and have had no problems with it that I know of till now. My girlfriends bleeding apple scoly is receding and one of my buddies said to dip it in an iodine dip. I don't know what that really consist of, but if someone can chime in on how and what to use that would be great. So what I know right now is that lugol's was a good way to go. thanks for the help.