I used to be married to a fish-culturist with the province's Freshwater Fisheries Society. It's just expensive—the pumps, the electricity, the tanks and moving water around. That's my view.
We did have some little net-pen operations when I was working for the province. They worked great, because all the poop just dropped to the bottom of the lake.
For me, outside the box here, really it's just pure economics.