Another of the additives that increases both the oxidation and the redox potential of your tank's water is Iodine, usually available in the potassium iodine form. It is used for a totally different purpose however. Iodine is needed by all living things and especially by macro-algae. It is removed rapidly from the reef tank by protein skimming and ozone, as pointed out again, recently, by Moe (1989).

Because it is a required nutrient some hobbyists add it as supplement, which is fine and should be done on a regular basis. The danger resides in the fact that one can overdose rather easily on iodine and make the redox potential rise too fast. Follow the instructions on the bottle that it comes in carefully.

Do not use Iodine as a redox potential altering additive. Use it only as a supplement required because it is a nutrient. Use any or all of the other methods to alter the redox potential.

THE MARINE FISH AND INVERT REEF AQUARIUM
Albert J. Thiel