Hi, I have a 70,000 gallon inground pool. My ph is 7.2 fc 9.8 tc is 9.8
hardness `190
alk 120 cynaric acid 120

I am not sure how the calcualtion works to figure out how much borax to add to up the ph. I would also like to know if a person can get a stomach ache from swimming with the cholorine that high. Is it dangerous??
The other thing, is how often do you need to put bleach in your pool before you have to check and add more? Can I get the calculation? I found an area where it said BBB but I lost it!!