Thank You so much.
I think I am going to go with 75% RO Water, and 2% acid malt.
How does this look for an American IPA with some assertive hop quality?
Starting Water (ppm):
Ca: 49
Mg: 17
Na: 20
Cl: 26
SO4: 33
CaCO3: 144
Mash / Sparge Vol (gal): 11 / 7.25
RO or distilled %: 75%...