I was aiming for a CYA of 40 in my new gunite pool. I started with 0 and added 5 lbs. That got me to 20 according to Ben's test kit. I did not know I was supposed to wait several days before retesting. The next day I tested and added another 2.5 lbs of CYA. Today I rechecked the CYA level and now I'm at 80!. I'll retest again tommorrow to confirm this reading.

The pool is about 18 to 20K gallons.
Should I just increase the Chlorine levels from 2 to 3 to around 5 or 6ppm?

Will the CYA levels drop after a while as I top off the pool water lost from evaporation and spash out - or do I need to take some other action?

Finally, how long should I wait between adding chemicals and testing for results?