Spa Choice 472-3-1001-02 Metal Free Stain Remover for Spas, 1-Pint, 2-Pack

Spa Choice Metal Free prevents the formation of new stains in your spa or hot tub. Applying Metal Free when re-filling your spa or hot tub will prevent the formation of stains caused by the oxidation of iron and other metals. Use this non-toxic, non-phosphorous product when filling or refilling your spa to prevent metal staining. DIRECTIONS: 1. Keep circulation pump running and add 1 pint (16 oz.) of this product around the spa waterline for each 625 gallons of spa water. 2. Circulate the spa water for 30 minutes. 3. Application of this product may deplete the bromine/chlorine level of your spa. Following application, test the spas bromine/chlorine level and adjust accordingly.