Well I got the temp set to 85 and thats where it is at. It took about 3 days to raise the temp from 71 - 80+, (the sun was strong after the rain period and I ran the filter for 10 hr cycles). I have an Aqua comfor heat pump. Hope that helps..

Its set to run 8hrs (cooled off a lot in last couple of days). Last week the heater turned on at first but run for a 4-5 of hours and then shut off. The last few days I noticed the heater was running the whole time the filter was running.

We used it both days this weekend so I try for 85 and if the weather doesnt stay sunny and/or the heater cant keep it that warm I will lower it to 80 or less. We do use a solar cover every night and move it off the deep end during a sunny day when kids are at school. Just a note, while in the vicinity of my electric panel i thought I heard it humming Just waiting for the utility bill.