you mean its naturally down from your well or tap? if so you can swing it with baking soda to make it closer to 6.5 7 something. but with aq buffering soil even down unless its often,you should not have to PH or adjust ,much of anything short of swinging it closer to where you need it,but to full on PH a tea is not the best thing to do.it can be done sure..short brews tend to be the best when PH'ing a living tea.