I made some calls this morning and I can get a truck on Friday that will deliver 6,500 gallons or I can get one that will deliver 9,000 gallons. I believe my pool is around 22,000 so should I'm thinking I have a few options. Option 1 is to drain 6,500 gallons and refill with the possibility of having to do another 6,500 and second time. Option 2 is to drain 9,000 gallons and refill. Option 3 is to drain 13,000 gallons and refill by having 2 trucks of 6500 show up. First question is which option is best or is there a better option. Also, when do I start to drain. Thursday morning? and how long can pool a sit with anywhere from 6,500 to 13,000 emptied. I'm scared to death of pool pop. I'm keeping my fingers crossed that draining 6,500 gallons and refilling will get me through the rest of the season and then I can do another drain and refill in the spring. When closing the pool for the winter we usually take it down about 16 inches and the winter snow will fill it back up but I have no idea how many gallons 16 inches is. Doesn't seem like more than a couple of thousand.