In The Swim Granular Chlorine Sodium Dichlor buckets are fast dissolving granular chlorine and leaves no residue, great for shocking or everyday use!

Fast dissolving, pH balanced
99% Sodium Dichloro-S-Triazinetrione Dihydrate
Contains premium-quality 56% available stabilized chlorine
Multi-use for super shocking or everyday routine chlorination
2, 5, 10, 25, and 50 lb buckets! Economically priced and effective
Calcium-Free formula keeps hard-water pools sparkling clean and crystal clear
Stabilized - contains UV inhibitor to prevent chlorine burn-off
Routine use: 3 oz. per 10,000 gallons
Super chlorination: 21 oz. per 10,000 gallons