AQUA-ORG PLUS - Model R-CH-O65-EUP-PS-18X1 -Calcium Hypochlorite Chlorine Pool Shock 18 x 100 lb Pails - 1 Pallet

Our 65% Calcium Hypochlorite granules are perfect for immediate & dramatic results when you need to clean & clear the cloudy water in your pool, spa, and hot tub. For use in swimming pools, spas and hot tubs. US EPA Registered - Filed & Approved Biocide UN2880 Calcium Hypochlorite Hydrated 5.1 PG II.  CAS Number: 7778-54-3 (Calcium Hypochlorite).