3 in 1 filter: filter equipped with an aquarium pump and double filter media, it can filter water, add oxygen and form a fountain at the same time, helping to agitate the water surface and improve ventilation Double filtration system: The activated carbon and foam that make up the best water filtration system for small aquariums ensures good oxygenation for clear water and a healthy environment Easy to use: Assembles and disassembles quickly and comes with five suction cups for secure installation in the aquarium Humanized design: The water inlet adopts relatively narrow fences to effectively prevent fish and shrimp from entering the filter Wide range of use: Perfect for irregularly shaped or shallow habitats - can be mounted horizontally or vertically and can be fully submerged 【Instructions and Use】: 1. This submersible pump can be used for multiple purposes such as pumping water, spraying oxygen, filtering, etc. 2. Suitable for freshwater and saltwater, safe and durable,