I realize this is an old post but I have this same problem now. I had it in the fall, thought it was taken care of but IT"S BACK! So I guess I didn't really have it taken care of!
today:
I have brushed, vacuum and shocked to 15ppm
CC-O
CYA 45 (tested between 40-50)
PH 7.5
vinyl lined 18X36 inground
I'd like to know if I should go higher with the Chlorine,if so how much higher and for how long.
My pool has full sun all day, the CYA is usually higher, has dropped from 60 over the last few months.
I sure hate to see my Pool Solutions kit run out of components...it is the best!
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