First year of owning an AG pool so this was my first closing. Everything went well. Water level was drained to about 2" below return. It's been roughly 2 months since I closed the pool and I've kept a close eye on debris & rainwater level on top of the cover (with a pillow in the center). Last night, I ran a pump for roughly 2 hours to drain water. I've measured my pump to 10 gpm so that would equate to roughly 1200 gallons on top of the cover. Based on the rainfall we've received in the last 2 months and some math, I'd say the volume is fairly accurate. Is it good practice to remove standing water on top of the cover through the off season and just prior to freezing?