This biochemical felt can culture nitro bacteria, filter the tank water and reduce the fish mortality. It is a good product to help your fish keeping.<br><br>Features:<br>Can be used in sea water fish tank, fresh water fish tank and water weeds tank.<br>The size can be cut as you want to suit your fish tank.<br>It is designed to culture nitro bacteria.<br>This biochemical felt is good for decomposing the fish wastes.<br>It can filter the tank water, improve water quality and reduce the fish mortality.<br>Clean it with water once a month and after cleaning, it can be reused.<br>It is unobstructed and not easy to bedeformed.<br><br>Specifications:<br>Color: Blue<br>Material: Plastic<br>Size: 37 * 13 * 3.5cm / 14.57 * 5.12 * 1.38in<br>Weight: 104.5g / 3.81oz<br><br>Package List:<br>1 * Biochemical Felt