Koi' are hardy and easy to keep in a well maintained tank. Regular weekly water changes of 1/4 to 1/3 is strongly recommended to keep these fish healthy. Snails can be added as they reduce the algae in the tank, helping to keep it clean. These fish need a lot of oxygen and produce a lot of waste. Good filtration, especially biological filtration, is very helpful in maintaining the water quality of the aquarium.
Water Changes: Weekly

Ph range: 6.0-8.0

Brackish: Sometimes

Water Movement: Moderate

Water Region: All - These fish will swim in all areas of the aquarium