I was wondering what I shuold set the chlorinator at to keep from getting to much CYA or not have enough . My pool is 16' x 32', 22,000 gal with a hayward filter system. Last year I had to close my pool in August, because of algae. The CYA level was to high and with the drought we had here in S.C., I wasn't able to drain it and refill to get the level down. So the algae made it's self at home until now. I don't want it to get out of hand now, especially since it looks like we might be in drought again. It has taken me a month to get it swimable. Thanks, R.D.