Hey y'all, I'm just getting on here so forgive me if I've missed a sticky thread on this. I have a 40k outdoor commercial pool which I did a half drain on for cya correction when it opened this year. My initial cya readings were 100++ but I did not run a dilute test at that time since my water was loaded anyways. After the drain and fill (re-chlorinated with erosion fed trichlor to 3 ppm) I was reading 100++ again and ran a few diluted samples with a high level pentair cya kit that gave me anywhere from 120-200 calculated cya. That was 2 weeks ago and I've switched to hand feeding calcium hypochlorate since and swapping 3 inches out a day as well as vacuuming strait to waste but my cya is still around 100ppm. Water is about 68° 7.6 ph and ta is under 60 due to the constant water changes. Do y'all have any insights for me as to what is going on with this pool as I'm at my wits end with the thing haha.