NEW Weatherproof Air Pump for small ponds. POND AQUARIUM PET Blagdon Pond Oxygenator Kit - Small Pond Key Features High output air pump for ponds Outdoor Weatherproof Water Garden Air Pump Increases Oxygen in the Summer Months Helps Prevent Pond Freezing During the Winter Aids in Circulating Your Pond. Small. Standard, and Medium Come Complete with Air Stone and Airline. 3 Year Warranty Description Fish and pond life require oxygen-rich water to remain strong and healthy. The beneficial bacteria in your filtration systems also need oxygen to flourish and keep your pond free from the build-up of toxic waste. Aeration is especially important through the warmer months where water holds less oxygen. Oxygenating plants produce oxygen during the day, however, they start to use oxygen at night, which depletes your pond of oxygen. The Blagdon Pond Oxygenator Kit provides an essential supply of oxygen to your pond. Air stones producing a stream of bubbles increases oxygenation in your pond through circulation and disruption of the surface tension film.