If you could get the golden shiners established, it would be another prey source for your predators. We kept talking about adding predators, and so of course, my thoughts strayed to what they would eat. Your only chance to establish would be stocking large adults. I don't know if you could find a source or not. Honestly, we've had a hard time getting them established. I have been wanting to find some wild golden shiners out in ponds in western SD, and then bring them back. Maybe they would get started more easily than naive shiners that are purchased straight from the hatchery?
