3 Reasons Your Pool Is Cloudy After Shocking

High calcium hardness If the water turned milky right after shocking, you likely have hard water with calcium over 400 ppm. The only real fix is a half-drain and refill.

Shocking during the day Chlorine burns off fast in direct sun, leaving no residual to kill algae and bacteria. Always shock at dusk and run the filter overnight.

High pH before shocking If pH is above 7.8, chlorine becomes far less effective. Check and adjust pH and alkalinity before shocking, or you are wasting chemicals.