I have a very simple forage pond. Next to my barn there is a swamp that is about 1/3 acre. It usually dries up in late august. When it it dry, I use a grader box to make a six foot wide trench about two feet deep. As the water gets to this low point, it is easy to seine. With just 5 pounds of fatheads in April, there must be millions of them in August! I think they lay eggs on the willow trunks.