A Koi pond is more than a hole in the ground with a liner and some water. To have a healthy, dynamic pond environment you also need a biological filter, a source of aeration, a circulation pump and adequate space, or volume. It is important to note that all of these elements must work in harmony with one another.
The filtration system purifies the water of wastes, bacteria and other toxins. An aerator supplies air to the water so the fish will have oxygen and the water does not stagnate. The pump moves the water through the filter and aerator. This cycle is the lifeblood of a pond. Water ponds, fish and oxygen ... the big secret to Koi fish keeping. We survive on this earth because we can breathe oxygen. Koi need oxygen and the beneficial bacteria that keep the water healthy need oxygen.
Aeration is the term that we use to mean adding air to the water. Since air contains 22% oxygen, aeration adds oxygen to the water. There are several very essential pieces of equipment to consider when planning a pond. None more so than a good reliable quality air pump, Add as much air to your pond as you can using air pumps and air stones to distribute the air (highly recommended for ponds that are heavily stocked). You can add the air directly to the pond, the filter, the waterfall and anywhere else you can think of. These numbers are intended as a guideline. Your application may vary according to stocking levels.
