The structure of impellor adopts patent technology; it can form slow stream with large numbers of confused stream and it can solve the defect of single stream-forming method and fast speed of stream created by common pumps. It can create a natural ecological environment for your halobios.The angle can be adjusted in any directions. And it is suitable for forming stream in any directions.Beautiful aspect, low power consumption, and large flux and various installation methods are available for the clients to use conveniently.