I also aerate shallow intermittently. When the snow builds up, or the ice gets milky, I start up and open a pretty good sized hole, then shut it back down. The refreeze will usually produce near window pane clear ice. Repeat when necessary.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.