Tube aerator will open automatically when working in air under pressure into the pool; if the oxygen in the air disappears under pressure, the microporous aeration tube will close automatically to prevent water from invading the tiny holes. In the process of sewage treatment, it can be used for a long time or disabled, and then put into use, will not generate mixed fluid in the micro-porous blockage and return.   Channel greatly reduces the resistance loss of the tube aerator; variables automatically open and close the holes and cracks, completely solved the aerator; hose linear aeration, gas uniformity, as well as the window vertical circulation, mixing more uniform; small bubble aeration hose, high oxygen utilisation and dynamic efficiency. Aerator aeration tube of different design models can be used to adjust the working pressure, different distance, density can change the efficiency of aeration.