I'm with Dave. Fish management is just that - management. If one is of the "dump em' in and forget em'" mindset, there will probably be issues. Grass carp absolutely have a role to fill in a great many ponds and lakes.

"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.