Just found fly sparging is single infusion, full body. Didn't discover that until I chose single infusion and look at the mash tab. Under the mash step list it says to fly sparge with the gallons and temp for the brew. brew Smith is great software but has many bugs that don't seem to get fixed.
I brew big beers typically with 17 to 23 pounds grain. Read on another web site a brewers efficiency starts to drop around 17 pounds grain, otherwise he gets 75% fly sparging. Has anyone else experienced lower inefficiencies with large grain bills?
Currently mash for 60 min and batch sparge for 30. Will try mashing for 60, fly sparge for 30 and check pH. What effect does pH have on efficiency? How do you control for it? What should a good pH be?
If fly sparging does not increase efficiency will mash for 90 and batch sparge for 45.