I have read some on this, and I am not 100% sure I understand. Why do we "maintain grain bed integrity" during a sparge? I would think you would want to mix the bed to avoid channel forming and ensure no area of the grain bed is neglected. I understand this could lead to an increased risk of a stuck sparge, but I imagine you gain an increased efficiency. Currently I do a semi-fly sparge, pouring approx. 1.5liters of sparge water over the grain bed (I protect the integrity using aluminum foil with holes punched in it) at a time, let it drain and repeat. This will normally get my 75% +/- 3% efficiency.
So I am wondering why would we not mix the grain bed during a fly sparge? Say, sparge with 1/2gal, mix, sparge, mix, etc. etc. Just curious. Thanks
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