The HTH Super Shock All-In-One is a calcium hypochlorite (Cal-Hypo) swimming pool shock treatment designed to restore and maintain crystal-clear water. This Costco pack includes 15 individual 1-pound shock bags and 15 6-way test strips for complete weekly pool care.

Using Cal-Hypo as the active ingredient, this shock treatment delivers a powerful chlorine boost without adding cyanuric acid (CYA), preventing the chlorine lock and over-stabilization that can result from stabilized chlorine products. Each 1-pound bag treats up to 13,500 gallons of pool water, with visible clarity restored in as little as 24 hours.

The all-in-one formula kills and prevents bacteria and algae, boosts free chlorine levels, and helps reduce eye and skin irritation caused by unbalanced water chemistry. Recommended for weekly use to solve 90% of common swimming pool water problems. Compatible with all pool types and safe for vinyl liners.

For best results, apply directly to pool water in the evening with the pump running. Maintain free chlorine between 1–4 ppm. The included 6-way test strips check chlorine, pH, alkalinity, hardness, and cyanuric acid levels.