added half a box of borax 2 1/2 hours ago. Just checked my pH and it is 7.2. We are about to get hit with a thunderstorm so won't be able to mess with the pool for a while.

If I am to keep my FC level at the max for the CYA level is that using the "best guess" chart? Would that mean for my CYA (18) I would add so that my chlorine is at the level in the far right column (20)?

Do I need to do anything at this time to get my CYA up?

Sorry about all the questions. I am trying to read everything on this site. I know I will get this eventually!! After all, I did fix my pump!