Air injection is a great aid for ensuring a healthy pond environment and water quality using aeration and biological filtration. Many of the biological processes in the pond (such as breakdown of harmful waste products) require oxygen. The Oase OxyTex Air Diffuser is a pond aerator and filter medium -- all in one! In combination with an AquaOxy 450 pump, it injects air for optimized gas exchange and works to ensure the health of fish. A unique combination of oxygen supply, water circulation and nutrient decomposition, OxyTex is a perfect supplement for any Oase filter.