Robelle 2550-02 Mineral Out Stain Remover for Swimming Pools, 1-Quart, 2-Pack

Robelle Mineral Out is especially formulated to help prevent discoloration of pool water due to iron, calcium, magnesium, copper and other minerals and metals. This product is particularly ideal for pools using well water or in regions where heavy metals are naturally present in the water. With regular use, Robelle Mineral Out is ideal for controlling general stains and helps maintain a sparkling clean pool. This product helps prevent discoloration of pool water due to iron, calcium, manganese, copper and other metals and minerals which may be present in the water supply. This product is an excellent general purpose sequestrant which helps protect plumbing and pool walls from rust, stain and scale. It should be used for all pool openings and closings and throughout the season as needed. For initial filling of pool, if iron or other metallic contaminants are suspected, add one quart of this product for each 10,000 gallons of pool water. Add this product while the pool is being filled and before chlorine is added. To correct an existing colored water problem due to the presence of minerals in the pool water, first close the pool to all swimmers. Leave the filter pump running. Stop chlorinating the pool and allow the chlorine level to drop to zero. Lower the pH of the pool water to 6.8 with a pH decreaser. Lowering the pH will redissolve the metallic impurities. Add one quart of this product per 10,000 gallons of water and allow the pool water to circulate overnight, or until the water is clear. Readjust the pH of the pool water between 7.2 to 7.8 with a pH Increaser. Begin normal chlorination and pool operation. Swimming may resume when chlorine residual is 1.0 to 3.0 ppm. To make up for loss of this product due to backwashing and/or splash-out, add one quart of this product for each 20,000 gallons of pool water, once each month.