Aquarium Double Sponge Filter with Built-In Pump Bio Media Aquarium Filtration Dual Sponge Filtration: Experience superior mechanical and biological filtration with the double sponge system. The sponges efficiently trap debris and provide ample surface area for beneficial bacteria to thrive, ensuring crystal-clear water. Built-In Pump: Say goodbye to external pumps and complicated setups. The Aquarium Double Sponge Filter comes with a built-in pump that ensures consistent water circulation, promoting oxygenation and preventing dead spots in your aquarium. Ceramic Bio Media: Enhance biological filtration with the included ceramic bio media. The porous structure of the media provides an ideal habitat for beneficial bacteria, supporting the nitrogen cycle and maintaining optimal water quality. Adjustable Water Outlet Height: Tailor the filtration to your aquarium's needs. The filter features a height adjustable water outlet, allowing for use with multiple aquarium sizes and setups. Suitable for both freshwater and saltwater aquariums. Effectively filters through a combination of physical and biochemical filtration methods to increase oxygen content and produce a clean and crystal clear aquatic environment. It is recommended to replace the sponge every 3-6 months. Wash the sponges regularly with aquarium water to prolonged their lifespan. The filter box can be filled with ceramic bio media balls or activated carbon, ammonium absorber, etc. It is recommended to replace these every six months.