There are some astounding amounts of feed being discussed here. Fascinating how goals, fertility, location, and species all interact in regards to feed usage. I'm hand feeding four ponds once a day, approximating 2.5 surface acres, and 40 lbs of Optimal usually lasts me 2-3 weeks, depending upon the mood of the fish. Quite pleased with the growth of my BG.

"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.