I never close my pool due to the warm climate (Louisiana). I just run the pump overnight if the temp is supposed to get down to 29 degrees or below.....and add a jug of bleach every 10 days to 2 weeks. It doesn't get easier than that! If you're not swimming, your chemistry isn't going to change very much...it's just a matter of keeping enough chlorine in the water to make sure algae doesn't try to grow.

Janet