I'm certainly no expert on this. But I recently visited a local hatchery and the guy showed my how he grows forage in his forage pond. He simply lays about 3 to 4 foot wide strips of black construction plastic in his pond around the edges in less than 3 foot depths. He says that minnows (I don't remember what kind he raises)will stick their eggs to the underside of cover. So the black plastic is twisted a few times so it won't lay flat. The fish lay eggs on the undersides. The black plastic helps the water stay warmer. That's all he has for structure in these lined ponds and he raises forage by the ton. Each pond is about 75 feet square.
