HTH Pool Care Chlorine Shock is a trusted pool treatment formulated with calcium hypochlorite to boost chlorine levels and maintain clean, clear swimming pool water. Its fast-dissolving granules sanitize and clarify the water while helping to prevent bacteria and algae growth. Unlike traditional chlorine products that contain cyanuric acid (CYA), this formula avoids adding extra CYA to prevent overstabilization or chlorine lock, which can cloud pool water. Suitable for all pool types including vinyl-lined and saltwater pools, it preserves the integrity of pool liners without fading. For optimal results, use HTH Pool Care Chlorine Shock as part of a weekly maintenance routine to keep free available chlorine levels between 1 and 4 ppm. Pair with HTH 6-Way Test Strips to regularly test and balance your pool water for a sparkling finish throughout the swimming season.

Maintain a sparkling clean pool all season long—add HTH Pool Care Chlorine Shock to your weekly routine today!

Product Dimensions:

4.25 x 10.87 x 10.51 in

4.99 lbs

Shipping Dimensions:

9.49 x 7.24 x 4.02 in