To my way of thinking, most folks with ponds harvest exactly as you describe.....a few fish here and there, rather than all at once. We have fresh fish once every week or so, and the "harvest" does not have a set ending date... the longer you leave them in the pond, the larger they will get....within reason. The fish left in the pond won't spoil if you only harvest enough for a meal once a week.

I think BG are tailor made for this style of harvest. CC work well too, but they may not reproduce, and require replenishment from time to time.

"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.