DryTec 1-1901-24 24-Pack Calcium Hypochlorite Chlorinating Shock Treatment for Swimming Pools, 1-Pound

Drytec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack

In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds

Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)