Hey Mark, yeah, summer heat makes a difference. I usually run mine about 8 hrs a day when it’s hot out, but it kinda depends on your pool size and how much it’s being used too. If we’ve got a bunch of people swimming, or it’s like 100 degrees, I’ll bump it to 10 hrs sometimes just to be safe.
Early on, I was running it too short, and the water started looking kinda cloudy and gross. Now I split the runtime like 4 hrs in the morning, 4 hours in the evening. Seems to help with circulation and makes the chemicals work better, too.
I also keep an eye on the pressure gauge and how the skimmer basket’s doing. If stuff’s building up faster than usual, that’s a sign I should run the pump longer. Every pool’s a little different tbh, so you kinda gotta feel it out.