I have recently started to experiment with whirlpooling my wort post boil. I don't use a pump so I am doing the whirlpool manually by swirling the wort with a spoon. First off is this an effective manner to do a whirlpool? Secondly, am I promoting hot side aeration by this method? Thirdly, is this a realistic concern given what I've been reading regarding the effects (or lack thereof) of HSA on homebrew?