The Pond Guy Pond Aerator is the ideal choice for aerating water gardens and koi ponds between 1000 and 6000 gallons. With the energy efficient diaphragm compressor paired with a low-maintenance non-stick PTFE Membrane diffuser stick your pond will receive the benefits of aeration. Choose between two aeration kit options based on your pond size and start aerating the water in your pond today. Kits include 17 watt 0.8 CFM diaphragm compressor with 6' power cord PTFE diffuser(s) and weighted airline (15' per diffuser).Protect your investment from the outdoor elements with a TrueRock Small Boulder to cover your aeration unit.