The 50#/acre was all brood stock, seemed like a lot to me too, but Jeff was pretty insistent on a heavy stocking for a pond that's already way too bass heavy. I think he was right, I certainly have seen good bass growth, and no surplus of small tilapia. I think they all got et.
I'm losing my tilapia as we speak, no way they'll be here by the end of T day weekend. I can still see a few lolling about, but they're really slow, and haven't been feeding for a few weeks. I'd be surprised if they make it thru the winter in Birmingham; I grew up in Arizona, and even there, every couple years, we'd have a cold snap and all the tilapia in the golf club ponds would go belly up