This may be a silly question, so I apologize if it seems elementary: I have CYA of 90. I've confirmed this with 5 tests on different days. I screwed up with sanitizer when I opened the pool. To ball park the drain amount, is it simply a solution %?
To drop from CYA of 90 down to CYA of 45, do I drain 50% of the pool, and refill?
To drop from CYA of 90 down to CYA of 45, do I drain 50% of the pool, and refill?
