Eight to ten hours a day is enough for most pools.

Yes, that’s the sweet spot. Run your pump long enough to circulate the entire volume of water once per day—that’s called a “turnover.” For a typical in-ground pool (15,000–25,000 gallons) with a decent pump, that takes 8–10 hours.

In summer, lean toward 10–12 hours if it’s hot and you’ve got swimmers and debris. In winter or cooler weather, 4–6 hours might do. But the real rule: one turnover a day. Run it in a continuous block if possible (usually during the day when solar heating helps), not in short bursts.

Over-pumping doesn’t make your water clearer—it just runs up the electric bill. Under-pumping lets algae and bacteria get a foothold. Eight to ten hours is the Goldilocks zone.

Your wallet will thank you.