I'm going to give this a try. Going to use the 12" footing tube as the up right tube and have that go up inside a 55 gallon drum.
Might use 2 55 gallon drums. Plan is for the bottom of the tube to be 1-1.5' off the bottom. Vertex diffuser under it. Then 3 or 4" pvc pipes out of the bottom of the barrel to spread the water out.
The commercial versions appear to catch all the leftover air and release it above water level. I was trying to think of a way to release it underwater, above the thermocline, to get additional circulation from the air. Any ideas?
This will be set in 14-15' of water, the deepest spot in my pond.
