I just took a water sample from our closed pool to calculate how much salt/CYA I would need for opening. We had a lot of precipitation in eastern PA this winter (water is up to coping), so I was expecting a good amount of dilution. However, the CH drop was more significant that I would have thought. It was at 475ppm at closing, and was at 75ppm from the sample I took. Pool math says I would have needed to replace 85% to see a 400ppm decrease.
Do any chemicals like CH "settle" to the deeper water of an uncirculated pool? Are any of the tests not accurate in cold water?
Do any chemicals like CH "settle" to the deeper water of an uncirculated pool? Are any of the tests not accurate in cold water?