Sun-stabilized protecting it from the sun's harmful rays.
Eliminate bacteria, algae, and other organic contaminants, keeping your pool clean and clear all season long.
Dissolve more gradually to prevent irregular chlorination.
99% Trichloro-S-Triazinetrione and 90% available stabilized chlorine. Tablets do not expire and are non-perishable, but performance is best within 2 years of the provided manufacturing date.