I've seen folks recommend 2 Tablespoons of ACV per Gallon. In our opinion this is too much.We recommend 1 TEASPOON per gallon. That will result in a ph of about 5.0. To see the ph of various amounts of ACV and how that relates to things like the ph of organge juice, Coke etc see our posting on the subject at: Chicken Water and Apple Cider Vinegar