Seachem Tidal 55 Foam (2 Pack) Marine Fish Their naturalistic design fits perfectly

Their naturalistic design fits perfectly in desert or planted terrariums

Comprehensive testing for Nitrogen and Dissolved Organic Carbon

or small freshwater fish

It can assist with the functionality of enzymes

Sock handle allows for easy removal of replacement sock

Seachem Tidal 55 Foam (2 Pack) Marine Fish Their naturalistic design fits perfectlySeachem Tidal 55 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.