sent son to get me the add-on kit.
Added two more boxes borax: Ph is 6.8, Chlorine is 3 (I added the last of my granular chlorine yesterday---4 cups)
CYA reading: didn't even come up to the first line, about a third of the way to "100" so I guess it is REALLY low.

there are light brown stains on the bottom of the liner now. any clues?

I await your COMMAND and thank you for your help!!