The OxyTex Air Diffuser is a pond aerator and filter medium put together in one nifty design. In combination with an air pump it diffuses air very finely for an improved gas exchange. It provides a blend of oxygen supply, water circulation and nutrient decomposition. The OxyTex is designed with a patented grass-like fiber structure that helps in providing an environment for beneficial bacteria. This helps to improve your filtration effectiveness and in providing an overall happy pond environment.