50 Pcs Bio Porous Filter Biochemical Ball Filter Media Water Filter Material with Cotton for Fish Tank Pond Aquarium Waterfall Fountain(36mm)

Wide Application - Our biochemical balls can be used not only in marine biochemical filtration systems, but also in freshwater biochemical filtration systems, perfect for use in aquarium, pond and aquarium. Function - A good helper to restore the natural water quality and provide the most suitable living environment for your fish. How to work - When the water is circulating in the internal space, the time is extended, using the nitrifying bacteria to achieve the effect of biochemical filtration Large volume - Strengthen the bacteria filtering effect, lightweight and easy to carry. >Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.