While koi fish may be known for their grace and beauty, few know that they are also one of the dirtiest and high-maintenance fish to own. Because they like to root up the pond’s bottom surface, and because they produce a lot of waste, koi pond water can easily become mucky and dingy. However, it’s extremely important for you to keep up with your koi’s environment. Keeping on top of maintenance ensures a proactive approach to any problems in the pond, and if problems do arise, you’ll catch them before they become even worse. Koi pond maintenance, while changing from season to season, is essential for the health and wellbeing of your entire koi population.