Seachem Tidal 55 Matrix

Matrixâ„¢ is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Every Tidalâ„¢ filter comes with a bag of Matrixâ„¢ to get you started. Matrixâ„¢ for the 35, 55, 75, and 110 units comes pre-bagged in Seachem Zip Bags, which feature durable seams & a corrosion-resistant zipper. Boxes of 12