The GS7 has been designed to process your sluicing concentrates. Simply plug your garden hose in and away you go. Not for the creek the GS7 is designed to process and separate fine gold from stubborn black sands and other heavies trapped by your sluice.
By slowly pouring your concentrates over the V mat it leaves a visible trail of fine gold washing the black sand away into your wash tub.
Just plug a hose in or a bilge pump would be suitable..