I like the venturi idea guys! Problem would be incorporating it into the existing setup. Not saying it can't be done but would not be a quick/easy project. The line from the well is buried 42 inches deep (below the frost line) and enters the pond under water; currently about 3 feet down. We are near low pool so the water will rise 3 or 4 feet more at full pool. As John suggested, another option would be to inject air before the line leaves the basement but the line pressure is 70 psig at that point so I would need an oil free compressor capable of higher pressure.

The question remains...is what I'm doing now by passing the well flow thru the diffuser "good enough" or is it causing a problem with low DO? Another question is, and probably more relevant, am I really gaining anything at all as far as mitigating super chilling by using the well water to "warm" the pond water locally during aeration? Thoughts?

Last edited by Bill D.; 12/30/17 08:21 PM.

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