Rx Clear Stain Off Pool Stain Remover Liquid, 1 lb Bottle, 4 Pack

Improves surface quality appearances Deeply saturates and removes long lasting brown, gray, and black stains Prevents stains, scaling, and brown water due to mineral build up Controls the levels of iron and other metals in pool water Compatible with all sanitizing systems Works perfectly on vinyl liners, fiberglass, and metal surfaces Use 1 lb per 10,000 gallons of pool water