High quality materials: Made of high quality plastic and filter cotton, their eco-friendly, hygienic and quiet design provides a natural aquatic environment for fish. It is recommended to clean the sponge once a month, and it should be replaced every 5-6 months at most. Safe and effective: The sponge filter can be used for both physical filtration and biological filtration. It is an ideal place for bacterial colonization. The sponge can capture floating debris and particles to prevent young fish from being sucked into the filter. Aerobic bacteria, they settle in the sponge and provide bacterial material to promote the nitrogen cycle. Double sponge design: The double sponge design plays a dual role. Two sponges mean more surface area, allowing beneficial nitrifying bacteria to colonize, speeding up circulation and maintaining the cleaning effect during the biochemical filtration process. Easy to use: You can use an air hose to connect one end to the air pump and the other end to the
