I have a friend who wants to sell me an acro colony from his display tank which is loaded with Tangs and is currently experiencing an outbreak of Ich. After acclimating the coral I will place it in my tank and is guaranted that some of the "Ich water" will get into my tank. I don't want to get the Ich in my tank. After acclimation with Iodine bath, can I do freshwater RO/DI dip so that I can remove the Ich from the colony? Any suggestions?