So I'm going to do my first all grain this weekend. It's a raspberry wheat from northern brewers it calls for a mash outta 170 for 10 min after the 60 min sacch's. My question is how do you know how much water to use? It doesn't tell you in the instructions. I found an equation for mash water which is grain lbs X 1.1=_ /4 does that sound right? Also how much sparge water do you use? I can't seem to find many answers on this. Sorry if it was asked a lot couldn't find it in the search.