I am trying to figure out how to get rid of an aftertaste in my beer. I would describe it as astringent, dull, flat. I am thinking it is due to the high CaC03 in my water.
My water unaltered is has total hardness (CaC03) 182ppm, PH 7.3, total alkalinity (CaC03) 177 ppm. Ca-61, Na-18...