HTH Pool Care Shock | 5lb. | 52234

The HTH Pool Care Shock Granules – 5 lb (Model 52234) is a reliable, fast-acting calcium hypochlorite formula designed for regular pool maintenance. Engineered to sanitize, clarify, and help prevent bacteria and algae, this multi-use shock works quickly to restore crystal-clear water—without adding stabilizers like cyanuric acid, which can cause chlorine lock. Safe for use in all pool types—including vinyl-lined, concrete, and saltwater systems—it dissolves rapidly to boost free chlorine levels and maintain optimal water balance. Ideal for weekly use, this 5-pound granule package treats large pool volumes effectively, keeping your water sparkly clean and swim-ready. Highlights Powerful Cal-Hypo Super Shock – Fast-acting formula eliminates bacteria, algae, scale, and stains in just 24 hours. No Cyanuric Acid Added – Prevents chlorine lock by avoiding stabilizer buildup, ensuring consistent sanitation. Visible Blue Action Indicator – Confirms active treatment is working with easy-to-see color signal during use. Safe for All Pool Surfaces – Compatible with vinyl-lined, concrete, and saltwater pools for flexible application. 1 lb Single-Dose Convenience – Ideal for weekly pool maintenance, trusted by homeowners and pool service pros alike. How To Use HTH™ Shock: Pool Chlorine Shock 1. Add Directly To Water Or Skimmer Follow the on-pack instructions according to your pool size. 2. Repeat Weekly For best results, use HTH™ Shock as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.