I have an "all in one" supplement that I dose once a week that has iodine in it. Never had any major problems that can be linked back to it (that I know of). Not sure about the pure iodine supplements though. I wouldn't, only because again I use the "all in one." _________ 125 Gal Reef. Born March 2002 FISH: Ocellaris Clown, Yellow Tang, Sand Star, Hippo Tang CORALS: Green Striped/Red/Purple Mushrooms, Green Star Polyps, Yellow Toadstool Leather, Bubble, Frogspawn, 2 Hammers, Yellow Polyps, Open Brain, Ridge Leather, Various Zoas, Button Polyps, Kenya Tree, Colt, Elephant Ear Mushroom, Clove Polyps, Torch, Purple Clam, 2 Rose BTAs  | 
