The Outdoor Water Solutions Backyard Windmill also has an optional add on windmill aeration kit that can be used to aerate small backyard ponds. These aeration units work in water up to 2.5 to 3 feet deep. Windmill conversion kit has been designed for the Backyard Windmill includes diaphragm compressor, 33' of airline and a specially designed Airstone. The air compressor on the windmill aeration kit is specially designed to turn at low wind speeds and pumps .3 CFM The air compressor is designed to attach quickly and easily to the ornamental windmill which transforms it into a full working windmill aeration system

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