Feature:<br /><br />\u25cfThe material has great thickness, it is durable.<br />\u25cfVery suitable for using in freshwater and marine water.<br />\u25cfCan be cut any sizes as your needed.<br />\u25cfLightweight and softness design.<br />\u25cfExcellent water permeability.<br />\u25cfCultivate the nitrifying bacteria for biological filtration.<br />\u25cfDense shape makes it effective to avoid residue.<br />\u25cfCan be used again after cleaning.<br />\u25cfThe biochemical filter has the best effect on decomposing the excrement and the forage leftover.<br />\u25cfIts multi-porous feature will avoid blockages and provide the largest adhesion area for bacteria.<br /><br />Product Attributes: <br /><br />Material: Sponge<br />Color: Balck<br />Quantity: 1 Pcs<br />Size(approx.) :50x50x4cm\/19.69x19.69x1.57inch (LxWxH)<br /><br />Package Include:<br /><br />1 x Biochemical Sponge Filter<br /> <br />Note:<br /><br />1.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.<br />2.Please allow 1-5mm differences due to manual measurement.