then it’s definitely time for a pool shock treatment. Most people assume that a chlorine-smelling pool means that it’s clean, but that isn’t actually the case. “This smell comes from ...

But household bleach, for example, is not a substitute for pool shock, as it's a much more diluted form of chlorine. Should I add shock or chlorine first? Shock is a periodic, as-needed treatment ...

Keeps water clear; See results in 24 hours; 1 bag treats 13, 500 gallons; Won’t fade vinyl pool liners INCLUDES: Twelve 1-lb bags of shock treatment for your swimming pool ...

Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes ...