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2. Water aeration - Wikipedia

   en.wikipedia.org/wiki/Water_aeration

   The impeller pumps water from the first few feet of the water and expels it into the air. [4] This process utilizes air-water contact to transfer oxygen. As the water is propelled into the air, it breaks into small droplets. Collectively, these small droplets have a large surface area through which oxygen can be transferred. Upon return, these ...

3. Water pumping - Wikipedia

   en.wikipedia.org/wiki/Water_pumping

   A spiral pump. A spiral pump, sometimes called a Wirz pump or incorrectly Wirtz pump, is a low lift pump which is composed of a long piece of metal plating, which is wound into a coil and sealed at the top and back extremities so as to resemble a cylinder. The outer cavity serves as the inlet, while the inner (partial) tube serves as the outlet.

4. Pump - Wikipedia

   en.wikipedia.org/wiki/Pump

   A pump is a device that moves fluids (liquids or gases), ... pond filtering and aeration, in the car industry for water-cooling and fuel injection, ...

5. Garden pond - Wikipedia

   en.wikipedia.org/wiki/Garden_pond

   This garden pond has two ponds separated by a waterfall with a one-foot drop; generally, the fish in the upper pond are smaller, and ones in the lower pond are larger. Ponds may be created by natural processes or by people; however, the origin of the hole in the ground makes little difference to the kind of wildlife that will be found in the pond.

6. Air pump - Wikipedia

   en.wikipedia.org/wiki/Air_pump

   Boyle's air pump. An air pump is a pump for pushing air. Examples include a bicycle pump, pumps that are used to aerate an aquarium or a pond via an airstone; a gas compressor used to power a pneumatic tool, air horn or pipe organ; a bellows used to encourage a fire; a vacuum cleaner and a vacuum pump. All air pumps contain a part that moves ...

7. Koi pond - Wikipedia

   en.wikipedia.org/wiki/Koi_pond

   An air pump can be used to increase dissolved oxygen. In a heavily stocked koi pond, an air pump is a necessity. Along with the water pumps, there must be jets placed in areas where there is little to no water flow. Jets may keep stagnant water from forming and possibly assist in preventing mosquito larva from breeding.