Description This item is well made of premium material for durable and practical use. It effectively helps remove harmful and nitrite in the water. The tiny pores make it an home for beneficial bacteria to grow, which can provide a good environment for fishes. Feature - Color: Black. - Material: Activated carbon. - Size: Approx. 10 x 10 x 10cm. - Activated carbon has a strong physical adsorption and chemisorptions role in the adsorption of certain organic compounds to achieve the removal efficiency. - The use of this principle, can quickly and effectively remove harmful in the aquarium water quality substances, odor, heavy metals, purification and softening of the effectiveness of water quality, as well as pigments, etc., so that to obtain direct and rapid improvement in water quality. - This activated carbon works faster, better, and longer than the rest. - Eliminates foul odors, unsightly discoloration, and harmful organic substances. - Made of material, durable and safe to use.Package list: 1 x Activated Carbon Filter