HTH® Pool Care Shock Ultra 1 lb Size:1 lb Clear UL and CSA markings

Clear UL and CSA markings speed approval by inspectors

for manual use or with an automatic scrubber

With a turn of the handle the patented air relief valve allows air to escape as you push the plunger into the bowl eliminating overflow

Proudly manufactured in the USA and available in a wide variety of diameters

HTH® Pool Care Shock Ultra 1 lb Size:1 lb Clear UL and CSA markingsUse this all in one powerhouse to quickly and easily increase chlorine levels, prevent bacteria, algae, stain and scale, reduce skin and eye irritation, improve filtration and soften your swimming pool water. All in 1 weekly Cal Hypo pool shock Use weekly to solve 90% of pool water problems Restores crystal clarity in 24 hours Visibly brilliant sparkle This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent