Quote Originally Posted by littleHeidi
Huh? I was testing how much I would have to add to raise the alkalinity, not the pH. I'm not worried about the pH right now. Out of curiousity, where is the borax calc page?
Borax will not raise your carbonate alkalinity. For that you need baking soda! Borax will raise pH. The borax calc page is to calulate how much borax will provide 50 ppm which is supposed to act as an algae preventative. Unless your pool water is VERY acidic, that much borax all at once will probably drive your pH up to about 8.0 which is where the borate buffer system tends to stabilize.