Tilapia? That's what I'd do, or maybe something harder to source like spotfin shiner or lake chubsuckers. Those carry significantly more value on the market should you elect to sell them. How the shiner or suckers would fare in an ap system is beyond my judgement.

Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau

[Linked Image from i1261.photobucket.com]