I keep my CYA at 80-90 ppm at all times, but I'm an exception to the norm around here. My pool is in full sun from 8am to around 7pm, and as you know it's a killer out there right now. I find that when my CYA is any lower, then I have trouble keeping adequate chlorine in the pool, even with daily additions. With it at 80-90, then I add every other day, or sometimes every 3rd. I do shock more often than others, though--I shock it after a week or so of heavy bather load and after any hurricane-driven storm. Glad to see another Louisianian around here!!
edit: BTW, I'm up very near Shreveport
Janet
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