http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=how-much-iodide-is-enough#1 I have a 125 gal. marine fish only. other than my fish I have a 3 inch spiney tail lobster and a small cleaner shrimp. The local fish store does not seem to be too sure on how much iodide i should add weekly. does anyone know? coatsy54 2010-10-05 http://forum.aqua-fish.net/?topic=how-much-iodide-is-enough#2 For the size of your tank I would add 10ml per week mickey 2010-10-11