4 Steps to Shock Your Pool After Heavy Rain

Keep the pump running during and after the rain This prevents debris from settling and keeps water circulating so chemicals mix evenly.

Test the water as soon as the rain stops Rain dilutes chlorine and alters pH. Adjust pH to 7.4–7.6 before adding shock.

Add enough shock to handle the extra contaminants Rain brings in dust, pollen, algae spores, and yard runoff. Don’t be stingy—a few dollars of shock now prevents cloudy or green water later.

Check stabilizer (cyanuric acid) if you got over an inch of rain Too low and sunlight burns off chlorine; too high and shock won’t work. Adjust as needed.