Oh man, Im never going to backpedal out of this one. Might as well gas it.
Leading experts agree that it is important to note the different requirements of mash and sparge water. Except for Kai, whos being difficult. You know Im kidding, right?
I should have mentioned that my example was with a pale. Water treatment is not a one-size-fits-all. Thats why we use these cool calculators.
I dont make anything dark enough or light enough to cause problems with the mash pH with my water. I do routinely acidify my sparge water, just to be difficult. I add a little acid to the jugs before I fill and store them
Kai you got anything on glow-in-the dark water?