HTH Shock Ultra, 20 x 1lb Bags

HTH™ Shock Ultra: The All-In-One Pool Care Solution

HTH™ Shock Ultra is an all-in-one weekly formula that takes care of all your pool maintenance needs. It increases chlorine levels, kills and prevents bacteria and algae, reduces eye and skin irritation, prevents stains from metals, prevents scale, improves filtration, and softens water. The best part? You'll see results in just 24 hours!

No More Cyanuric Acid Worries

Unlike traditional chlorine products that contain cyanuric acid (CYA), HTH™ Shock Ultra is different. Excessive CYA can lead to overstabilization or chlorine lock, which clouds your water and promotes algae growth. HTH™ Shock Ultra's fast-acting, fast-dissolving Cal Hypo based formula provides chlorination without adding extra CYA, ensuring a beautiful sparkle all season.

Safe for All Pool Surfaces

HTH™ Shock Ultra is ideal for all pool surfaces and won't fade your liner. It's the perfect solution for maintaining the beauty and cleanliness of your pool without causing any damage.

Easy to Use

Using HTH® Shock Ultra is simple. Just follow the on-pack instructions according to your pool size and add HTH® Shock Ultra directly to your swimming pool water or skimmer. The built-in Visible Blue Action lets you know it's working! For best results, apply HTH® Shock Ultra as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4ppm.