Hello. I am looking to put in a AG pool in North Dakota. Not a soft side a rigid frame like a Doughboy ect. I am wondering if there is anyone out there that has kept one year round in ND or similar weathered area. What do you do in the middle of winter when the temps are -30 for days at a time? I've had a soft sided intex that I take down every year but would like to upgrade a bit. Please advise me on wintering as leaving the pump on is never going to work!