If you're targeting 100 mesh minus gold I would just narrow the main sluice with a piece of wood or aluminum angle (to 3 inches or so), and run with the limited water you have. The rough top conveyor belt is excellent for catching flour gold. Fun day regardless!
The video is a description and the process of finding small gold. I enjoy finding it, although leaning the geology of my area, small "float" gold moves down stream, and it's what's here. Found a spot, ran the dirt through sluice boxes and finished with my pan to see how much gold was there. It's not much, but it's still better than nothing haha
