10 LB Nu-Clo Calcium Hardness Increaser For Pools - Calcium Flakes Prevents Corrosion 1850

Nu-Clo Calcium Hardness Increaser For Pools calcium increaser & hardness Sizer 10 LB, flake granular form  1 LB per 10,000 Gallons to Raise 15 PPM Prevents corrosion in pools & spas This product will raise the calcium mineral level of pool water Maintain this level at 175 ppm (parts per million) in vinyl-lined or fiberglass pools and 240 ppm in concrete or plastered (marcite) pools MFG # 1850 025336185009 Satisfaction guaranteed  Shipping Information: Free Shipping in the USA, see checkout for options Business Purchasing & Partnering: Need bulk? We offer large quantity discounts. Please email or call us for a quote We accept tax exemptions from verified company's & organizations We offer drop shipping if needed. Please call or email for more information