[Suction cup] The suction cup makes the adsorption more stable, which is easy to install and allows you to position the pump virtually anywhere in your aquarium. [Useful] This suction pump Waves creates strong waves to circulate water quietly and efficiently. [360° Rotation] Adjustable head allows for consistent water circulation, ensuring every part of the aquarium has access to oxygenated water. [Filter cover] The wavemaker pump with filter cover to prevent fish suction. [Water circulation]Provide a extra flow and keep the waste in suspension so it can be removed by the filtration system.