I'm puzzled that my pH didn't go up when I added borax per the pool math calc. Here are the numbers I used for the calculation prior to adding the borax in the amount calculated yesterday evening:
1. pH (current): 7.2 to 7.3 (darker than 7.2 but lighter than 7.5 on the color meter in the TF100 kit)
2. pH (goal): 7.6
3. TA: 60
4. Borate: 15-ish (going by the test strip kit)
So, pool math says that to go from 7.3 to 7.6, add 12oz (by volume) of borax. My TA is low, so I figured it wouldn't hurt until I can build my aerator.
I added 12oz, waited about 90 minutes, pH stayed where it was. Of note is that I added 16 oz of HTH Metal Control at the same time and filled a knee-high stocking with 7oz (by volume) of CYA to get my CYA from 60 to 70.
Any idea why the pH would not have moved? I just ran all my numbers this afternoon:
FC 6.5 (getting ready to run the filter 24/7 with the eyeball output breaking the surface for some aeration while I build my aerator)
CC 0.5 or less
TA 60 to 70
Borates 15 to 20? Hard to tell on the LaMotte test strips (ordered boric acid for borate push).