1.Extremely Aquarium Filter Media for efficient biological filtration. and decompose harmful substances in water,safety and energy saving<br />2.Two strong suction cups are great for mounting onto the glass surface either vertically or horizontally，suitable for various fish tanks<br />3.The angle of water outlet can be adjusted in four direction( about 120℃, horizontally,about 30℃ up and down),increase waves making <br />4.Scientific structure : easy to clean or replace the filter cartridge 5.Backed by 12 month warranty and professional after-sale service within 24hrs.<br />