Again, it's not likely that your pH hasn't changed. What is possible is that your pH is so low that your existing test kit can't measure the change.
Do this:
#1 - Do a pH test again. Presumably, it will turn yellow, which with phenol red is 6.5 or LOWER. Add a tiny pinch of borax to the test chamber. The water should turn purple or at least red. That verifies that everything is working.
#2 - Add around 23 more pounds of borax - 5 boxes of 20 Mule Team borax -- which may or may not raise your pH enough, but will put you firmly in the 'good zone' for borates.
#3 - Retest. If your pH is STILL not high enough, buy some Arm and Hammer WASHING soda (not baking soda). Here, locally, it's right next to the borax in Walmart. Add 2 boxes at a time, wait 2 hours, and retest. Drop back to 1/2 box at the first sign of pH change.
(Follow Waterbear's advice on the Metal Free)
Bookmarks