It appears to me that it would be relatively easy to have a water calculator that would automatically tell you what chemical additions to make to your mash water if you are starting with distilled water. However, I cannot locate anything on the internet that offers that. When I try to use the water calculator, starting with 0 across the board, I have to spend 15 minutes adjusting and changing all these numbers around to get to "all green" numbers. I wish I could simply tell it I have "x" water volume and am using distilled water and I want to brew a Doppel (or whatever beer style) and it would tell me how much of what I need to add (e.g. 2 grams gypsum, 3 grams epsom salt, 5 grams calcium chloride, etc.) Does anyone know of such a calculator?