Just as an example of where my water is currently and where I want to brew, I added 8g of CaCO3 (chalk) and 1g of Gypsum to get my dark lager profile at Ca-61, Mg-0, SO4-22, Na-150, Cl-150, HCO3-319...all in ppm. I just brewed this a few days ago and will add to the thread once I have it kegged...