After 4 days of afternoon rains, it was sunny when I got home from work so I had a chance to clean the pool. The water was clear but a lot of dirt on the bottom. I put the vacuum on waste, put a hose in the pool to replace the water, and started. After 37 minutes, another storm came up and I had to quit. I noticed that the water level was down quite a bit, even though I had the hose on full blast. I ran the numbers in my head and I was astounded!
Although I don't know my exact flow rate, I assume that it's average, and will move 3,000 gph. Thirty seven minutes of sweeping will remove 1850 gallons. That's about 7% of my water! Even with the water hose going flow, it's only replacing the water at about 150 gph, so no wonder I'm losing water so quickly.
So...what is the best way to clean a pool that gets a lot of dirt without losing so much water? Should I shut off the main, sweep everything to the drain and then send it to waste? Should I run it all through the filter, and just keep backwashing it when the pressure rises to my threshold?
This is the one area that Pool School doesn't have a lesson plan for.