« on: April 06, 2010, 09:08:52 AM »
I have seen the pH rise as much as 0.4-0.5 points in batch sparging. But this only happened with alkaline sparge water and when I either did 2 sparge batches or made a small beer.
Which likely explains why I haven't seen it rise. I don't have alkaline sparge water, I almost never do more than one sparge addition, and I almost never make a beer below 1.055. It's good to have data that contradicts my specific situation so that I know it's possible for the pH to rise.