If you own a pond and you notice that the fish in that pond are starting to die and the pond is starting to smell badly, the chances are that you do not have any type of aeration system for that pond or, if the pond is deep, you are using an aeration system that was only designed for shallower ponds. Either way, it is past time that you reviewed your pond’s aeration. As a pond is a body of stagnant water, the water is not circulating which causes the water at the bottom of the pond to become short of oxygen. The level of this un-oxygenated water grows and the fish that had been keeping nearer the surface start to be affected and therefore become unhealthy and die. As this is happening, algae are encouraged to grow and it is the algae which will give off the unpleasant odour.
For purposes of aeration, ponds can be divided into two types, shallow ones which have a depth which is less than about 5 feet and deep ponds that have a depth deeper than that. There are therefore two main types of aeration systems you can buy, a system designed for shallow waters or a system designed for deeper waters. As far as shallow waters are concerned, leading pond aerators are fountains. As well as being an effective aeration system for a shallow pond, a fountain can also be a thing of beauty, adding an extra element of attraction to your pond and that is probably the reason for their popularity. For the deeper ponds an aeration system that comprises of a pump, a tube and a diffuser are needed. For the sake of safety, the pump will be located on dry land somewhere near the pond and it will pump air through the tube to the diffuser which will be located at the bottom of the pond. As the pumped air is released by the diffuser at the bottom of the pond, it will travel to the surface and whilst it does, it will oxygenate or aerate all the water it meets on the way up plus, it will cause the water to circulate allowing it to better aerate itself as well.
A source of power is obviously needed for the pump and that power is electric but if your pond is located far from a mains outlet, you may prefer to purchase a windmill style system. With this type of system, the windmill provides the power for the motor and so no main power source is needed which, apart from being very practical regardless of where the pond is located, it also avoids extra money being added to your electricity bill each month.
Once you have reviewed several different aeration systems and decided which one is right for your pond, you will start to see a difference in that pond; fish will stop dying and eat more, leading to them becoming bigger and algae will slowly disappear, allowing you to clean up what is already there.