ProGuard 3" TriChlor Chlorinating Tablets - 50 lb Pail - Leisure Pool & Spa Supply, Inc.
Pool Mate 1 1405m All in Swimming 3 Inch Chlorinating Tablets 5 Pound for sale online | eBay
Rx Clear 1-Inch Stabilized Chlorine Tablets | One 8-Pound Bucket | Use As Bactericide, Algaecide, and Disinfectant in Swimming Pools and Spas | Slow Dissolving and UV Protected - Walmart.com