Management. If someone's idea of management is to stock HBG one time and walk away, then yes, they may suffer problems. If the fish are stocked or utilized in an inappropriate setting for them, then that may cause issues also.

I would recommend taking some time and really studying up on HBG, before deciding one way or another. Lots of misinformation and hype out there regarding these fish. The fish farm wants to sell you fish. the internet is full of HBG misconceptions. Somewhere in the middle is some good info.

"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.