Description This filter pad is made of premium material for durable and practical use. It has the best effect on decomposing the excrement and the forage leftover. It can be used in sea water tank, fresh water tank, aqua-plant tank. And its strong filterability can stable water quality and reduce fish died. Effective to avoid residue and reduce the death rate of fish and chemical filtration and increase the oxygen solubility in aquarium and fish tank. Strong filterability. It can be used repeatedly after cleaning. Suitable for sea water tank, fresh water tank, aqua-plant tank. Encryption and thickening, can be used for repeated cleaning. Great fish tank and aquarium filter cotton and give the fish fresh environment. Feature Color: As shown. Material: Cotton. Size: Approx. 120*10*2CM/47*3.9*0.79IN Package Included:1 x Filter Cottons Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.