An vital piece of equipment for any pond, but perhaps more so for a Koi Pond, is the surface skimmer. If you intend to build a Koi pond, be sure to include one of these in the process.
Installing pond skimmers is simple. Before it gets a chance to settle to the bottom and begin to break down and affect the quality of your water, they will gather any trash that falls onto the surface of your pond or leftover food into a collection basket.