I am new to all of this and need some advice. I live in North Huntindon, Pennsylvania and we just got an Intex 18'x52 Ultra Frame pool. We had a little Intex round pool with a blow up ring for the past 2 years but decided to upgrade for next summer. The pool comes with a sand filter. I'm not sure what chemicals I need to put in once we fill the pool. And I was also wondering (and hoping😊 that it will be ok for us to leave the pool up thru winter as well. If I am able to, what are steps I should take to winterize it. PLEASE HELP!!!!!!