I was also flabbergasted to learn that in parts of the country, sakrete is cheaper than limestone. I suppose I'm fortunate to live where I do, and have cheap, plentiful limestone readily available. And no leaky ponds here either!

Shoot, flooded limestone quarries make up a great deal of the local landscape. Always intrigued me how they remain full of water.

"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.