Using Palmer 's 'How to Brew' recipes and techniques. Mash hour, sparge, let sparge rest 15 minutes. Went through my limited notes (damn rookie) and appears don't have important water numbers. Example: last brewed IPA, started with 5-gallon mash, finished with 6.5 gallons of wort, but don't have how much added or preboil volume - believe sparge with 4 gallons. OG was 1.042, FG 1.01