HTH Pool Care Shock Advanced, Prevents Bacteria & Algae, Cal Hypo Formula, 1lbs (Pack of 12) HTH® Pool Care Shock Advanced is the powerful 4-in-1 formula with Cal Hypo that kills and prevents bacteria and algae as well as reduces chlorine odor and irritation for crystal clear, healthy swimming pool water. Traditional chlorine products contain cyanuric acid (CYA). When too much CYA builds up, it can cause over-stabilization or chlorine lock and cloud your water. The fast-acting, fast-dissolving Cal Hypo formula in HTH® Pool Care Shock Advanced provides chlorination without adding extra CYA for a beautiful sparkle all season. This product is great for all pool types and won't fade your pool liner. How To Use HTH® Shock Advanced Follow the on-pack instructions according to your pool size to add HTH® Shock Advanced directly to swimming pool water or skimmer. Make sure to use a clean, dry scoop. For best results, apply HTH® Shock Advanced as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4 ppm. Multi-functional shock treatment for weekly use Prevents bacteria & algae Use weekly to solve 90% of pool water problems within 24 hours Restores crystal clarity in 24 hours Visibly brilliant sparkle This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent over-stabilization or chlorine lock. 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’s why we're 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're 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. Stay all clear for cannonballs! This fast-dissolving, convenient 4-in-1 chemical formula kills bacteria and algae, reduces chlorine odor and irritation and quickly restores crystal clarity. Compatible with all swimming pools This product is great for all pool types including vinyl-lined pools and salt water systems. You're all clear with HTH® For best results, use with HTH® 6-Way Test Strips to test and balance your swimming pool water twice weekly.
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