My daughter is having a birthday party this Saturday. The temperatures this week are supposed to be in the 70's (highest 79 on Thursday) with Saturday being 63 :x We are going to heat our 18,850 gallon pool for the first time for her party. We do not have a solar cover. How long with a 400,000 btu heater will it take to heat the pool from 60 (what it currently is, although I hope it is warmer after a week in the 70's) to 82? I want to make sure we get the pool warm enough to enjoy but don't want to heat it longer than I really need to. I have also thought about buying a liquid solar cover just for the party to keep the heat in as I am heating it up but I have read bad reviews.
Thanks in advance!
Thanks in advance!