Out filter Mate sulfur odor Neutralizer is a simple and safe way to get rid of the annoying Rotten Egg smell caused by hydrogen sulfide gas in water. This unique liquid formulation is used in conjunction with a chemical feed system to restore the taste and smell of water. Sulfur odor Neutralizer prevents corrosion of a plumbing system caused by iron and hydrogen sulfide present in drinking water. Dosage: For oxidation of impurities, feed Sulfur Odor Neutralizer until there are very few oxygen bubbles in treated water. For iron treatment, feed Sulfur Odor Neutralizer at 2 ppm per 1 ppm of iron