Ask Mr. Wizard

Mash pH Importance


Andrew Ignatz asks,

How important is mash pH? I’ve been homebrewing for almost 20 years and never measured it. Is it a fine point in tweaking your beer? Does it improve efficiency or fermentability? I batch sparge and run between 68–71% efficiency.

Mash pH is extremely important. Enzyme activity is a function of pH and all enzymes are only active in a relatively narrow range around their optimum pH. In the case of mashing,
Response by Ashton Lewis.