Gold Mining Fine Gold Recovery Mini Sluice Box with Legs

We have been prospecting for years. Recently our paydirt cleaning unit had to be replaced. We used this contraption multiple times, running about 5 pounds of concentrate over it. Gold smaller than 25 mesh is very easily washed away. We ran it in every way possible and can't get it to do a better recovery job. We ended up with less than panning. Don't make the same mistake we did, spend the extra money and get a better one.