Hth 52031 Pool Shock Treatment 13.3 Oz Cal Hypo

Product Description

The HTH 52031 is a calcium hypochlorite (Cal Hypo) based pool shock treatment formulated to rapidly boost chlorine levels, kill bacteria, and eliminate algae in swimming pools. Weighing 0.87 pounds per unit, this 13.3-ounce treatment uses a fast-acting, fast-dissolving Cal Hypo formula that delivers effective chlorination without adding cyanuric acid (CYA). That distinction matters: traditional chlorine products that contain CYA can lead to overstabilization — commonly called chlorine lock — which clouds water and reduces sanitizer effectiveness. Pool service technicians and knowledgeable DIYers reach for Cal Hypo shock specifically to avoid CYA buildup over the course of a season.

This shock treatment is suited for routine maintenance and recovery treatments across all residential pool types, including vinyl liner pools, fiberglass pools, and plaster pools. It will not fade vinyl liners. Typical applications include weekly oxidizing treatments, post-heavy-use super-chlorination, and algae remediation. Pool service professionals will find the 13.3-ounce per-unit size practical for single-pool treatment tasks without the handling complexity of larger bulk formats.

Key Features

• Cal Hypo formula provides chlorination without adding cyanuric acid, preventing CYA buildup and chlorine lock
• Fast-acting and fast-dissolving for rapid chlorine level recovery
• Kills bacteria and algae to restore water clarity
• Safe for all pool types including vinyl liner pools — will not cause liner fading
• Compact 13.3-ounce unit size at 0.87 pounds for easy handling and single-application use

Compatibility

Designed for use in all residential swimming pool types, including vinyl liner, fiberglass, and plaster pools. Compatible with standard pool water chemical programs where reduction or elimination of additional CYA contribution is desired.

Installation Notes

Pool shock products are typically applied by licensed pool service technicians or experienced pool operators following local and state pool chemical handling regulations. Always power down circulation equipment if required by dosing instructions before adding shock directly to pool water. Wear appropriate PPE including gloves and eye protection when handling concentrated chlorine compounds. Never mix pool shock with other chemicals prior to application.