“The Blue Bowl” as it is commonly known will quickly recover your fine gold with only the water from a garden hose.
Panning fine gold and black sand concentrates by hand is very difficult and can be incredibly tedious. The Blue Bowl can recover Gold as fine as talcum powder when setup and run properly.
This is the famous plastic blue bowl gravity concentrator designed to work forever with no moving parts. Comes with water flow control valve.
It is strongly recommended to wet the concentrates prior to adding them to the Bowl.