Pond Boss Forums AERATION Systems questions Koenders 3 CFM in 5mph winds

What unit is this pump curve for? It shows about 3/4 CFM at 5 mph and a maximum output of 3.5-4.5 CFM at 25 mph. Using the average wind speed for Rimbey, Canada (8.2 mph), this pump curve shows it would be putting out about 1.3 CFM of air at a diffuser depth of 5 feet.

In my opinion, this type of average flow is adequate for a single diffuser. Two diffusers would work if desired, but the total flow and turnover rate would likely suffer, some, due to added overall line lengths and I would stay away from that. Either way, you are relying on the wind and pond turnovers would obviously change with the wind speeds from day to day. Given your situation (no power and the desire for aeration) The unit depicted by the curve would be best suited for a small pond around a 1/2 a million gallons (1/4 acre, 10 foot deep - thereabouts) with one diffuser at a depth of 5 feet. This has been calculated using an average wind speed of the 8 mph, a 1/2 million gallon pond, a Vertex 9" diffuser @ 5', minimal line lengths (preferably 5/8 id line, not 3/8"), and turning the pond over twice in a 24 hour period...assuming wind for the whole time. Should the wind only blow half the day at that speed, you would still get the recommended full turn over per day.