When you drain your pool (to waste) is it ok to drain water out to levels below your skimmers? Im assuming the pump obviously needs to be on to do this. Do I need to turn my heater and SWG off while do so? We've never done this before. Basically just wondering the process/protocol in general. Our pool has too much salt in it, so we need to drain some out and replace it. We have an inground pool approx 37000 gals with a SWG.