This product is designed with the principle of air pressure siphon, which helps aquarists to change and pump water in the fish tank conveniently and simply, and replaces the ancient method of sucking with the mouth of a water pipe, making fish farming easier, safer and more hygienic. At the same time, it absorbs water and helps to clean sand and gravel, residues and stains attached to water plants and sand beds. until the water comes out of the spout