I've gotten my pool balanced after firing my pool guy. I have a question about how much chlorine usage/loss is normal for a pool similar to mine. When I read the threads, it seems like mine is using considerably higher amounts. After dumping the pool guy, I drained the pool to get the CYA lower, down to ~55ppm. Chlorine usage was about 96 - 110 oz per day (6% Chlorox), for 11000 gal, it would be about 4.5ppm/day. I added CYA, to bring it up to about 60, and now my daily usage is about 84-96 oz per day (3.5-4.0 ppm/day). Overnight chlorine loss is consistently about 1ppm.
My numbers are:
FC - 5
CC - 0
pH - 7.7
TA - 80
CH - 290
CYA - 60
Pool temperature ranges from 85-94, depending on ambient conditions and whether or not I'm aerating overnight.
So, the questions are:
1. Is this amount of chlorine usage above normal for hot, sunny Arizona?
2. Should I increase the CYA to reduce daytime loss of chlorine due to UV exposure?
Thanks for all the great info. My pool is finally consistently clear and inviting!