First - a set of numbers from last evening:
30,000 gallon inground vinyl, 7 hours full sun.
FC 2.4 (before adding evening's dose)
CYA 60 (has been creeping up due to addition of cya - started at 20)
I have been adjusting the level to 6ppm for FC each evening as the cya increases.
According to the calculator I've needed to add about 2.3 bottles (96'ers) of bleach each night to bring it back up.
I have read on these forums some folk only add half bottle or so daily (depends on pool size of course) to the water.
There is no visible algae, only the sun. Something is chewing up the chlorine really fast.
Should I be adjusting something else - because at this rate - it's about $60 a month in bleach alone? I'm not going to change back to the old ways because the water looks better than ever.
Thanks for the assistance.