for high volumns of cons in a stream id be looking at the DFS sluice. i have one and really like its results when used properly! google DFS and you should pull up Allans site in Albq. New Mexico
He should really get his page edited. In the description of the DFS it says catches fine gold and nuggets too, then two lines down it says for fine gold only not nuggets. I was considering buying it until I saw that. Not like I find alot of nuggets anyways, but it just seemed like a poor reflection on the product.