Oceanvista's 3 Inch Swimming Pool Chlorine Tablets - 50 lbs child-resistant bucket. Individually wrapped tablets, high-quality pro-grade chlorine with 99% active ingredients. 90% stabilized chlorine, long-lasting slow dissolving swimming pool chlorine. UV Resistant and stabilized to prevent chlorine burn-off. Simple to use, no measuring, guesswork, or mess. Simply add to your floating chlorinator or automatic feeder.