Seachem Tidal 55 Blue Foam Filter Sponges, 2 Pack
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Tidal™ Foam Filter Sponges
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.