HTH Pool Care Granule Shock Treatment 5.5 lb Mini Light Pendant BlueDEF is key to helping

BlueDEF is key to helping improve fuel economy by up to five percent while simultaneously reducing exhaust emissions

Seasoned and ready to use

screw tightening

Only 4 Wiring Connections Required

wiring options and other features

HTH Pool Care Granule Shock Treatment 5.5 lb Mini Light Pendant BlueDEF is key to helpingAbout 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.