7 Day Tablets DuraChlor 35% Available Chlorine 1 oz per 3,000 Gallons Daily Compare to Lithium Item # Size 3425 25 lb 3450 50 lb MSDS Info 7 Day Sticks One A Day Tablets Granular Chlorine  - DiChlor  - TriChlor Granular  - DuraChlor  - Lithium Bromine Balancers Shock Treatments Algaecides Clarifiers and Flock Demineralizers Liquid Chlorine Lithium Calcium Hypochlorite Winter Kits Spa Chemicals Maintenance Items Private Labeling