Alright, so I just realized that the 1/2 box prescription for borax was for 10,000 gallons. And I had my Pool Calculator on my iPhone set to "soda ash." Pool Calculator says I need to add 154 oz. of borax to raise it from 7.0 to 7.6. So I added a whole box (76 oz) and I plan on adding another box later tonight after testing. That should get me back on track.