Run your pool pump 8–10 hours a day in summer.

That’s the sweet spot. Less than that and you risk algae. More than that and you’re just burning electricity—most pools don’t need 24/7 circulation.

The science is simple: you need to turn over the entire pool volume at least once a day. Most residential pumps can do that in 8–10 hours on a single-speed setting. If you have a variable-speed pump, you can run it longer at lower speed and still get equivalent turnover for less money.

What matters more than exact hours is when you run it. Run it during peak heat (midday to late afternoon) when chlorine burns off fastest. That keeps your chemical levels stable.

Also, clean your filter regularly. A dirty filter makes your pump work harder and circulate slower, so your 8-hour run might not actually turn the water over.

Start with 10 hours, test your water clarity, and if it looks good after a week, try 8. Don’t go below that in the dead of summer unless you really know what you’re doing.