Koi pond Aeration
Koi pond aeration is a process by which oxygen exchanges occurs at the surface of the pond water.
It is not a chemical reaction, but a process where pond water is exposed to the atmospheric pressure, or weight, of the oxygen. The point of aeration is to move as much air as possible to the surface of the koi pond, and there are several ways to do that.
* Using Air stones in your koi pond are one way to provide aeration.
They can be run from two separate air pumps, which is good because if one malfunctions, the other can continue running and help the koi survive until the broken stone can be repaired. One problem with air stones is that they are not great at lift; when the pond water hits the surface, there are a lot of air bubbles. This doesn’t hurt the koi, but it does make it difficult for you to see them in your koi pond.
* Flooming your koi pond is another method of aeration.
It involves putting a water pump on the bottom of your koi pond and aiming it upward. This basically pushes the pond water to the surface and creates a gentle swell on the surface rather than air bubbles, allowing you to see your koi. You should pre-filter the pump with a sponge or screen so that it runs all the time. It is also a good idea to run an air stone as a back-up for the pump.
In summary, flooming and air stones are two good ways to provide aeration in your koi pond. Air stones can create a lot of air bubbles, but flooming creates more of a gentle swell.