The HTH Shock is a direct replacement for the Fi-Clor Superfast Granules.
HTH Shock Granules – Calcium Hypochlorite.
The HTH Shock is an instant solution to fix green or cloudy water and raise the chlorine level. The fastest and most efficient shock chlorination on the market.
Cynuric Acid free. Ideal for indoor swimming pools.
Fast dissolving and no degassing.