The mash pH is a measure of the acidity or alkalinity of the mash. Mash pH affects conversion efficiency and, to some extent, fermentability. The mash pH should be in the range 5.1-5.6, with 5.2 considered optimal.

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How can I raise my mash pH with something other than chalk or baking soda?

I recently moved to Rhode Island and my mash efficiency has suffered. The main part of my process that has changed is the water. The pH as measured by colorpHast strips (and two other off brands) ...