Keeps water clear and clean for up to 3 months!• Clears Dirty and Cloudy Water • Reduces Toxic Levels of Ammonia• Increases Oxygen Content in the Water• Contains Essential Minerals to Keep Fish Healthy and Their Colors Bright• Balances pH Clear as Crystalis a natural pond cleanser. When used in a pond it will slowly clearcloudy or dirty water and keep ponds crystal clear for up to 3 months.Clear as Crystalis a unique form of Laumontite Crystal, Calcium Aluminum Silicate and when placed into pond water, produces oxygen, balances pH, purifies water through an ion exchange process, reducing toxic levels of ammonia, contains essential minerals that are utilized by the fish to keep them healthy and their color bright and will keep your pond clean and Clear as Crystal.