Single Diaphragm - Windmill Aeration SystemHarness the power of the wind and save money on your energy bills with our Single Diaphragm Windmill Aeration System. Features & Benefits: Ideal for smaller ponds up to one Acre The system can transfer up to 25,000 cubic feet of oxygen per month into your water source. Runs up to two airstones. Works in low wind conditions with as little as 3 5 mph Provides bottom up aeration for your pond, encouraging oxygenation of the water. Vent off unwanted