A KOI POND

Koi are prodigious waste producers, and koi enthusiasts like to keep large numbers of fish in small spaces. A koi pond must be designed to facilitate the rapid removal of fish waste from the bottom of the pond, so it should have relatively steep side walls and a smooth bottom that slopes gradually to a bottom drain. A depth of 36" to 48" is adequate, except in severe climates.

In the illustration, a concrete collar is poured in a level trench around the pond so that the top of the concrete is about 6" below the desired pond level. A pit is built to hold the filter and pump equipment. The pond is then excavated, protection fabric is laid over the soil and collar, and the fabric is covered with a rubber pond liner. Partially submerged rocks, laid without mortar, form the finished edge and conceal the rubber liner. Waste laden water flows from a bottom drain to a vortex pre-filter that settles out solids. An external pump then conveys the water through a pressure filter designed to provide biological filtration for heavy fish loads, through a UV Sterilizer (not shown) that kills any remaining algae and prevents the spread of disease, and finally into a small pond (left) filled with water hyacinths and other fast-growing pond plants that extract any remaining nutrients.

KoiPond

KOI POND KITS: We can custom design a complete kit with everything required to build a koi pond of any size and shape. Typical components are shown below: click on an image or title for more information. After construction has been completed, we can also ship a package of appropriate plants.