Mechanical filter media is usually made from synthetic fibers of various coarseness, meant to catch debris and particulate matter as water passes through your filter. Mechanical filter media commonly comes in sponge or floss form. Sponges have the added ability of biological filtration as bacteria will live on their surface. Mechanical filter media is the first stage (called pre-filtering) in a filtration system; its larger pores will prevent debris from clogging your more delicate chemical and biological filter media further along. Of course this means you'll have to clean it regularly, but the materials are very easy to rinse out.
Browse our mechanical filter media by your brand of filter, by type, or scroll down for our complete collection! (If you're looking for diatomaceous earth, you'll find it with our diatom filters.)