Koi ponds can be designed specifically to promote health and growth of the Nishikigoi or Japanese Ornamental Carp.
It collects leaves, pollen, twigs, uneaten food and all other kinds of floating debris.
Most floating skimmers will also have a foam that sits underneath the basket to filter out the finer particles.
In addition, many bottom drains are equipped with air diffusers, adding much needed oxygen to a pond.
Types of mechanical filters include Vortex, brushes, matting, sand and gravel, sieve screen, and settlement chamber.
Proper and regular cleaning of the mechanical and biological filters is critical for the health and quality of the koi.
An ultraviolet light is used to make algae flocculate (form into clumps), so that they can be removed by mechanical filtration.
Jets may keep stagnant water from forming and possibly assist in preventing mosquito larva from breeding.