Our primary water source is a 330 gpm inlet via a 6" pipe. Having studied the wisdom of the Pondboss omni media, I understand that well water contains no dissolved oxygen. Our inlet was relocated to the North end of our 9 acre pond a few years ago to provide current to the pond and improve the water quality of that end of the pond (outflow is at the South end into a 800' canal that empties into our 6 acre pond). I had been thinking of simply putting riprap under the inlet to agitate the water and introduce DO. A friend has suggested a venturi may be more effective. Can anyone give a nod to either method? If recommending the venturi, can you recommend a source for one for a 6" pipe? Thanks.