Hello all, my pool finally cleared up. But, I over shot my ph levels. It was about 7.0, I added a box of Borax and now it's 8.0+. My pool is 12k gallons. How can I use the "shot glass method" to test PH? Here are my numbers.

FC 30
TC 30
PH 8.0 or higher
CYA 95
TA 80

What should I do? What will happen if I leave it? What is the highest, safe CL level?

BTW, Last year you may remember my ph was super low, off the chart. I added about 10 boxes of borax to get it up to the 7 range. Someone asked how this happened, I had no clue. Last night I started thinking about how it got so low and came up with an answer. I had a brick patio installed. While the men were working, a huge amount of brick dust ended up in pool. I ran filter and it cleared up. I think that's want brought my ph so low. Any thoughts?