Based on the bottom structural configurations. Uneven deviations from the basic bottom bowl shape will tend to restrict the affects of the aeration water patterns. This I think means more bottom based aerator diffusers will be needed to get effective circulations to all areas of the deeper pond basin. To my thinking I would have at least 4 bottom diffusers and better to have 6 or 7. The cross ridge hump side should have 3 maybe 4 diffusers. Then put 3 of the other side of the pond. A 3/4 hp rotary vane with 10 cfm open flow will operate 6-8 diffusers. Done right with strong circulations IMO you would only need to run the compressor 6-8 hrs per day to adequately circulate deep water areas (7ft & deeper) to the surface. I tested my minnow pond (10ft deep) that has no aerator yesterday. Water was mixing with wind circulation and good oxygenation down to 7 ft deep. Water clarity this year so far 2-2.5ft.

Is aeration needed? What is the benefit? Does it reduce or eliminate algae?
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