Providing oxygen in the water of fishing ponds to prevent shrimp,fish,or other aquatic products from dying of lacking of aerator Function:1.Providing enough oxygen in the water of fish, shrimp and other aquatic products farming 2.Expanding farming density and improve oxygen concentration in ponds everyday, espacially critical on bad wheatherMain Parts:1 Motor:1hp/4P 2 Reducer: worm style reducer ...