My cya is about 60 and my chlorine range is 5-9. I use about 3 ppm a day and and 4.5cups a day to bring it back up. Left town Friday night and brought my pool up to shock level of 18. Figured when i returned Sunday night i would find a Chlorine level of 12. Returned and tested chlorine level and it was 8.5.
So my question is, if outside of your recommended chlorine range does your cya loose its ability to buffer your chlorine loss? Will i loose chlorine at a faster rate during the day when it is above 9 versus when it is between 5-9?
I also had a lot of rain so i am sure some of my loss was due to dilution. I had to drain several inches of water.