I brewed 13 gallons of American Pils on Monday. Mash PH was 5.3 with my strips. That includes adding the .3 low factor. PH meter would not calibrate, so that’s my guess. Strip actually read 5.0. I sparged with straight RO water. I was teaching a new brewer and forgot my minerals for the kettle. I wonder what my kettle PH will be? Is there a way to figure this? It was 27lbs of straight Pils malt if that makes a difference.