I brewed a dry stout yesterday. The recipe is pretty much the murphys stout from clone brews book with half a kg of oats added plus different hops. The recipe notes asked for 150ppm of CAC03 (chalk) I had none so I just concentrated on hitting the correct ppm for calcium & had a guess at some of the other salt additions - Main concern was mash PH & sparge water PH.
I used ezwater calculator. Screen shot below:
(http://i.imgur.com/EPoQYxJl.png)
The only values I know for my water is the RA/Hardness which is 74.5 & my calcium which is 50ppm (I know this because Dr.Jacoby did the tests with me at the Capital Brewers meet - thanks DJ!) Would anyone like to critique my water for me?
Send a sample to Murphy and son.
http://www.murphyandson.co.uk/laboratory/index.html