Aquarium Filter, Aquarium Biochemical Foam Filter, Biochemical Filter Sponge, Thickness:50x50x2cm(small hole)

Large size 50502cm, filter mats can be cut to fit your filter for use in any aquarium or pond filter Sponge filters provide mechanical and biological filtration that captures large amounts of waste and is not easily clogged. Pore size is measured by the number of pores in the area (PPI), and the higher the PPI, the more pores there are in the (fine) sponge. It is recommended to use a combination of sponges of different specifications for best results. Safe for aquatic animals and free of dyes. Filter mats are commonly used as prefilters for wet/dry filters, collection tanks and reservoir filters. Regular cleaning, reusable after cleaning, durable Vacuum sealed compression packaging, easy to store, does not take up space, suitable for to all types of aquariums. (After unpacking, follow the instructions in the user manual, restore the size for use)Delivered quantity: 1 piece (small hole).Product color: black 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.