The HTH Pool Care Shock Granules Ð 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 waterÑwithout adding stabilizers like cyanuric acid, which can cause chlorine lock. Safe for use in all pool typesÑincluding vinyl-lined, concrete, and saltwater systemsÑit 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 Ð Fast-acting formula eliminates bacteria, algae, scale, and stains in just 24 hours.

• No Cyanuric Acid Added Ð Prevents chlorine lock by avoiding stabilizer buildup, ensuring consistent sanitation.

• Visible Blue Action Indicator Ð Confirms active treatment is working with easy-to-see color signal during use.

• Safe for All Pool Surfaces Ð Compatible with vinyl-lined, concrete, and saltwater pools for flexible application.

• 1 lb Single-Dose Convenience Ð Ideal for weekly pool maintenance, trusted by homeowners and pool service pros alike.

How To Use
HTHª 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 HTHª Shock as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.