Rx Clear® granular chlorine is 99.3% Sodium dichloro-s-triazinetrione dihydrate. Dichlor helps to resist UV light which assists in the longevity of the chlorine. It is pH neutral product which will help you save time and money on corrective chemicals. It is 100% soluble--add directly to skimmer with no calcium residue.
Compare to Pace®, Biogard®, and Sun®. Available chlorine 56%.