About This Item HTH Shock is the original swimming pool shock designed to boost chlorine levels and kill bacteria and algae for a clean clear pool. Traditional chlorine products contain cyanuric acid CYA. When too much CYA builds up it can cause overstabilization or chlorine lock and cloud your water. The fast acting fast dissolving Cal Hypo based formula in HTH Shock provides chlorination without adding extra CYA for a beautiful sparkle all season. This pool shock is great for all pool types and will not fade your pool liner. How To Use HTH Shock Follow the on pack instructions according to your pool size to add HTH Shock directly to swimming pool water or skimmer. For best results apply HTH Shock as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4 ppm. About HTH Pool Care HTH was developed with the pool owner in mind. We know that maintaining your pool water can be a lot of work. That is why we are here every step of the way helping you clear the uncertainty from pool care. With economical easy to use solutions HTH is designed to work hard so you are prepared to tackle whatever life throws in your pool. From balancing your water to treating green water we offer a full line of products to keep your pool water healthy and your swimmers happy.
Shock treat, sanitize, clarify and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product
Multi-use pool shock with cal hypo
Use weekly to solve 90% of pool water problems within 24 hours
Fast-acting and fast-dissolving
Visibly brilliant sparkle This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock.
Compatible with all swimming pools This product is great for all pool types including vinyl-lined pools and salt water systems.
This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
You are all clear with HTH For best results use with HTH 6 Way Test Strips to test and balance your swimming pool water twice weekly.