I really like the water chemistry calculator and how it ties into the recipe editor, but it is missing an important idea that would make it much easier for me to use. I know my starting water profile (it's actually distilled) and I know what I want to add in order to get that source water up to my expected profile, but I don't measure out tiny amounts of each individual mineral every time I brew. Instead, some time prior to brew day, I mix up a fairly big batch of minerals (enough for, say 100 gallons of water) and then dole out that mixture in appropriate amounts when I go to brew. It would be really sweet if the water chemistry calculator worked with me on this. For example, to mix up my "bitter" mineral mix, I dump the following into a zip lock bag: 150g gypsum 20g kosher salt 20g epsom salt 10g baking soda I shake it up really well and then dole this mineral mix out into my source water at a rate of 2g per gallon. It simplifies my brew day by having the minerals ready to use, I can measure out the individual minerals in amounts my scale can actually handle precisely, and mixing up such a large amount of mix also helps to average out any precision errors I or my scale might make when measuring things out. Now... the feature request: It would be really nice if I could enter and save this mixture with a name (e.g. "bitter"), and then enter an amount of that mixture as a single adjustment into the water profile section of my recipe. This along would be a big help to me. But... even better would be if somewhere along the way (perhaps in the water chemistry section of the recipe) the tool could tell me how much mix I should use for this recipe. How? Well, if my recipe knows how much water I need, I tell the recipe which mineral mix to use, and that mineral mix specifies a rate to use in grams/gallon, then all the information is present to calculate how much of the mix to add to the recipe. This would make my life so much easier when it comes time to enter the mineral adjustments on brewday Anyway, hopefully you get the idea. I make a big batches of minerals to achieve certain water profiles. On brew day I dole out that mineral mix into my source water at a known rate to achieve the desired profile. It would be super awesome if Brewer's Friend tools could help figure out how much of my mineral mix to use on a recipe, and then record that information with the recipe and feed it directly into the water chemistry calculations.