A Koi pond is a water garden that features decorative Koi fish, which are colorful varieties of carp. These ponds are often designed to enhance the beauty of a garden or backyard, providing a serene environment for both fish and plants. Koi ponds can vary in size and depth, and they typically include features like rocks, plants, and filtration systems to maintain water quality. Maintaining a Koi pond involves regular care, including monitoring water temperature, pH levels, and cleanliness. Proper filtration and aeration are essential to keep the water healthy for the Koi. Many enthusiasts enjoy feeding and observing these fish, as they can grow quite large and live for many years, sometimes even decades.