In The Swim 1 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Fast Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds U001050050AE

Powerful Sanitizer: 90% available stabilized chlorine and 98.6% Trichloro-S-Triazinetrione (TriChlor). Eliminates bacteria and prevents algae growth in hot tubs, spas, above ground or in-ground swimming pools. Balances Chlorine Levels: 1-inch size helps to avoid inconsistent chlorination. Dissolve at a faster rate when used in floating feeders and automatic chlorinators. Tablets weigh approximately 0.5 ounces.