I'm new here and had a question about my CH level. I drained/filled my pool after new tile and have the following numbers:
25k gal, inground, gunite, chlorine,
After filling I shocked it and all chlorine was gone within a day. My plan is to first raise CH.
I purchased dowflake. The pool calculator has me adding about 35lbs of Dowflake. Is there a limit I should add at a time? Also, any idea why my FAC is dropping to 0?
Thanks for any info.