Thought this might be of use to others. Martin noted in this thread httpss://www.homebrewersassociation.org/forum/index.php?topic=14478.0
(a little over a year ago) that you can correct for the additional acidity of Rahr Pale Ale malt by upping the lovibond rating by 3L in BrunWater. So, for example, my sack of RPA rated at 3.7L should be entered as 6.7L in Bru'nWater for the sake of pH estimation.
Martin, do you still find that to be an accurate workaround for pH estimation with this malt?
Denny, I noticed you chimed in there too, have you used this adjustment to account for the increased acidity of Rahr Pale Ale malt? What have you found that works?
Any further guidance on the same effect that Kai noted with wheat malts and their high distilled water pH?