KoiAir 1 Aeration System oxygenates water in medium to large koi ponds. Aeration also keeps ice open during winter for a fraction of the operating cost of pond heaters.
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Shallow Water Aeration System with Easy Set Airline
Airmax Eco Systems 600811 Shallow Water Series System, No EasySet Airline, As Shown
While trying to find a method for aerating water without energy input, Austrian engineer Franz Zotlöterer stumbled across the idea of a mini-power plant which is simple to construct and has a turbine efficiency of but which is safe for fish due to