on corals? ive never heard that...they dont do well to that at all...ive heard diluted iodine dips for parasites and fungus..but never freshwater....most corals can think of couldnt handle that. do u have an article for me Andy?...not saying ur wrong.You can do a freshwater dip for corals aswell...
your normal inverts, cant really see why there would be a need too..
Niko