In a 0.25 ac pond with average wind exposure I would put the diffusers on one dual manifold in the deep section of the pond. This will circulate the majority of the pond that is deeper than 6ft which in most cases is the natural mixing depth. The shallow areas than 6 ft will not stratify at least for long enough to cause DO problems. What is the water clarity. How deep can you see a white coffee cup?


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