I've been playing around with the Brewers Friend water calculator for this weekend's brew and I'd just like to verify that I'm approaching it correctly (or at least acceptably) I brew on a sort of HERMs system so there's one main water source. For a 10 gallon batch, I might start with 20 gallons of water: First, I transfer 9 gal over to Mash and add salts to balance as the calculator recommends. Then I would use the calculator to adjust the the remaining 11 gallons down to a desired pH level and use 5 of those gallons to sparge. So even though I only sparging with 5 gallons, I should tell the calculator that I'm sparging with 11. That won't mess up any further calculations within the program, will it? Thanks!