Robelle 1 qt. Swimming Pool Stain Preventer Winter Pool Closing Anti-Stain Control (2-Pack)

Robelle Winter Pool Closing Anti-Stain Control for Swimming Pools helps control formation of scale and metallic stains. Robelle Anti-Stain is an effective dispersant and scale inhibitor which removes and controls scale, stain and other deposits in the swimming pool. Directions for use: Backwash filter, then add 32 oz. of this product per 10,000 Gal. of water. Addition should be made while the filter is running, allow filter to run continuously for at least 24 hours after addition. While this product is marketed for winter pool closing, it can also be used other times during the swimming season.