Hi helpful people. I am, as the title implies, planning on entering my underground lab, donning my white coat, safety specs and a set of highly accurate scales.... Or adding some salts and acid to water depending on your propensity for drama. I have been using the incredibly detailed mash water chemistry calculator thing. Not for the faint hearted !! For my next brew https://www.brewersfriend.com/homebrew/recipe/view/600639/wop-wops-ipa I was planning on these additions. https://www.brewersfriend.com/mash-chemistry-and-brewing-water-calculator/?id=X4VJSZX I know its not perfect but without adding RO water which is not readily available in Nottingham UK and the fact that I heat 120l in hlt it's the most in-depth I'm ready for. Any thoughts, as always your assistance is greatly appreciated.