Zeolite can be used to help maintain clear water in fountain ponds. Zeolite is a natural mineral that has the ability to absorb and retain impurities, such as ammonium and other waste products, from water. By using zeolite in a fountain pond, you can help to reduce the amount of organic waste and excess nutrients that contribute to poor water quality and promote the growth of algae and other unwanted aquatic plants. In a fountain pond, zeolite can be added to the filter system or placed directly into the pond to help maintain clear water. The zeolite will absorb and retain impurities, reducing the amount of waste that contributes to poor water quality. Additionally, by promoting a healthy environment, zeolite can help to encourage the growth of beneficial bacteria, which can further improve water quality by breaking down harmful waste products. It's important to note that while zeolite can be effective in helping to maintain clear water in fountain ponds, it's not a substitute for proper maintenance and water management practices. Regular water changes, proper filtration, and the use of appropriate chemical treatments, when necessary, are all important steps to take in order to maintain clear and healthy water in a fountain pond.