Absorption of CO2, making carbonic acid. Boil it to remove the CO2, or add a mineral to increase it, such as calcium carbonate (lime).
Marshall Leo Regehr wrote: > I must measured my kitchen tap water with a ph strip and it read about > 6.8 > Then I measured some dw that was about 8-16 hrs old and it read about > 5.6 > Why would that be?? What is the best way to raise the ph before > drinking it? > Leo > ----------------------------------------------------------------------- >