A lot of us in the northern states will move our diffusers to shallow water for the cold water period. That greatly reduces the chance of incorporating the warmer water found in the deeper parts of the pond into the colder, shallower water. What we're striving for during cold water aeration is to simply to open a hole, not so much mix the entire water column.

"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.