5 Things to Know About Treating a Pool After Rain

Test the water first Heavy rain dilutes pool water and brings in contaminants like dust, pollen, and grass. Always test pH, alkalinity, and chlorine before making adjustments.

Raise pH and shock with chlorine Rainwater is slightly acidic, so pH usually needs to be raised. Add chlorine to shock the pool and kill any algae or bacteria.

Adjust alkalinity before pH Alkalinity may drop after rain. Correct it first, as stable alkalinity helps keep pH in range.

Run the pump longer that day Extended filtration helps clear contaminants and mix chemicals evenly. It is a simple step that prevents bigger problems.

Do not drain and refill the pool Unless the water is overflowing and affecting the skimmer, draining is unnecessary. A quick chemical tune-up and longer pump run time are all you need.