In The Swim Stain Away Pool Stain Remover - 1 Quart

In The Swim Stain Away Pool Stain Remover, prevents and removes mineral stains caused by iron, copper, and magnesium. It also prevents the build-up of scale around the water line and in the plumbing. When minerals oxidize they discolor, after discoloration if the mineral settles on the interior it can leave a stain. Iron will go red/brown, copper will go purple/black, and magnesium is pink/purple. Stain away is a must for areas with heavy iron/copper content or well water. Initial Dosage: 15 oz. per 10,000 gallons. A double does is suggested for stubborn stains. In the Swim Stain Away Pool Stain Remover should be applied directly to the pool water at a rate of 15 oz. per 10,000 gallons with the pools circulation system running. Allow the pool to circulate for 3 - 4 hours. Regular brushing is suggested and encouraged. A double does is suggested for stubborn stains and scale. Active Ingredient: Hydroxyethylidene Diphosphonic Acid (HEDP) 13 - 15%