I'm in Ohio, and this is my first year with my new pool. Right now temps are getting into the low 40's overnight, but are hitting the mid 70's some days, including this weekend. I haven't been turning my heatpump on when I'm not planning on swimming, but this weekend looks good. I was going to turn on my HP this morning, and let it run 24-7 through Saturday. Should I even bother running the HP overnight when the temp gets down in the 40's? Looking to get the pool to the low/mid 80's (it's getting to the mid 60's during the day right now). I'm not going to put a solar cover on.