I will add that IMO API melafix is the best dip for AEFW for several reasons: A) knocks them all off every time within a couple minutes (baste the coral obviously) B) very gentle on the coral C) dont have to rinse several times and worry about getting dangerous bayer in your tank or on your body D) its clear, so you can actually see them come off as you do it. I have no idea if it actually kills AEFW but it definitely knocks them all off very quickly. usually i can blow them off within 30 seconds. I used this to rid my old tank of AEFW and i know several other people have had success as well. Dose is 20ml per 1/2 gallon.