Originally Posted by Blender
If you batch sparge one of the best things you can do to increase efficiency is a better crush. I bet your will see it rise into the 70's. I did a couple at factory settings and then slightly decreased the gap and still have not had a problem in mashing\sparging.
I second that... I fly sparge, but still, making a change to my crush pushed me from the 60's to the high 80's on efficiency... just from the crush.
Now of course there are a myrid of reasons why a batch might not reach it's full potential, but nailing the crush will be a significant step in getting close to perfection!!! Good luck.