Gold Sluice Boxes for Prospecting - Water Powered - Gold ...
Since gold is heavy, it will stay in the bottom of the sluice, trapped in the miner's moss. A good rule of thumb is to set your sluice at a grade of one inch per foot of drop. At least start here, and adjust as needed. A steeper grade may result in all but the coarsest gold being carried away by the force of the water.