Shock your pool after heavy rain.

That’s the single most effective thing you can do. Run the pump, test the water, and add enough shock to handle the extra junk the rain brought in.

Rain isn’t just water. It brings dust, pollen, algae spores, and runoff from your yard. Plus it dilutes your chlorine and messes with pH. If you don’t act fast, that perfect storm turns greenish or cloudy within a day or two.

Here’s the simple playbook:

• Keep the pump running during and after the rain.
• Test the water right after it stops. Adjust pH to 7.4–7.6, then add shock.
• If you get a lot of rain (like over an inch), double-check your stabilizer (cyanuric acid). Too low and the sun burns off your chlorine; too high and the shock won’t work.

Do that, and you’ll stay clear. Skip it, and you’re fighting cloudy water for the next week.

This is not the time to be stingy with chemicals. A few bucks of shock now saves you a much bigger headache later.