I just ran CYA for the first time.
FC 2.5
PH 7.4
CYA 45

I didn't seem to lose FC over night. My pool pressure indicates that it's time for backwashing. How long does it take for CYA added to the skimmer to dissolve totally.
According to the chart I'm just under the min so I'm adding 1/2 gallon of the cheap stuff. Thank you for the help.