SeaChem Tidal 110 Blue Foam (2 Pack)

• The Foam Filter Sponge (35, 55, 75, & 110) acts as mechanical filtration, trapping detritus and other large particulates. It is your first stage of filtration, and its use will help extend the life of chemical filtration media.
• Every Tidal™ filter comes with one Foam Filter Sponge to get you started.