Tetra Pond Crystal Water effectively removes dirt particles to improve visibility into the pond. Working in a matter of hours it binds cloudiness caused by clay particles or soil. As well as cloudiness caused by organic particles, such as fish waste, uneaten food or dead plant material. Tetra Pond Crystal Water coagulates floating particles that cloud the pond water. This makes it easier to filter out these particles or to remove them by hand. Tetra Pond Crystal Water improves the water quality in the pond, enhancing the well-being of fish and plants. Not suitable for sturgeons.