Hi I've done a few extract brews some with steeping grains. Just preparing to do a partial mash. I keep running into mention of whirlpooling hops. Don't see any mention of it and any of the beginners guides I have read so far including the one in the forum here. By the name I am assuming you are creating a whirlpool after flameout for a few minutes. Is this correct ? And if so exactly how long?