High-quality materials: Made of high-quality plastic and filter cotton, environmentally friendly, hygienic, and low-noise design provides a natural aquatic environment for fish. It is recommended to clean the sponge once a month, and it must be replaced every 5 to 6 months at most. Safe and efficient: 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 protect young fish from being sucked into the filter. Aerobic bacteria it settles in the sponge and provides bacterial material to promote the nitrogen cycle. Double-sponge design: The double-sponge design plays a dual role. Two sponges means a larger surface area, which allows beneficial nitrifying bacteria to colonize, accelerate the circulation, and maintain 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
