HTH Pool Chlorine Granules - Pool Water Specialists

This brand of Cal Hypo is no longer available – please consider our Pool Master alternative, click here.

hth® ​ Calcium Hypochlorite is one of the world’s leading brands of dry chlorine. Includes an anti-scale feature to limit maintenance of equipment and feeding systems. Does not contain cyanuric acid (CYA). Calcium Hypochlorite.