Having a bit of trouble with water chemistry this evening. I wonder if you might point me in the right direction.
In looking for Ca, Mg, Na, SO4, and Cl in a few homebrew shops here, I found only Calcium Carbonate, Calcium Chloride, and Magnesium Sulfate (using RO water for a pale ale). It seems that if I use any of those available here, my levels will consistently be off - if I want 100 ppm Ca and 50 ppm Cl, adding Calcium Chloride may always meet one level but always overshoot the other. Am I misunderstanding chemistry? Or is it that homebrewers are so disinterested in chemistry that homebrew shops don't bother carrying these items?