Hi! We have a 30,000 gal ig pool that we want to try to open ourselves this year to avoid the $300+ bill we usually pay. We have the typical sand filter system. I'm wondering if (after removing plugs/cover/filling pool etc.) just filling the pump with water, then closing it, and then running it is the correct way to do it. Won't too much air from the incoming lines get in? Do I need to fill the sand tank with water, or just let fill duing priming?? THanks so much!!