In The Swim 1 Inch Pool Chlorine Tablets 50 lbs.
COMPARE TO BIOGUARD, SUN, GUARDEX and PACE.Powerful 89% available stabilized chlorine. The slowest-dissolving, longest lasting chlorine you can buy. Perfect for floating feeders or almost any automatic chlorinator. Each chlorine tablet weighs 0.5 oz. Dosage: approximately 25 tabs per 10,000 gallons of water each week. 99% Trichloro-S-Triazinetrione.