Brand new biochemical sponge filter!<br>Provides biological filtration to the aquarium， helps to stable water quality<br>Increase the oxygen solubility<br>Working noiselessly<br>Good permeability， easy to clean<br>Adhere smooth surface with suction cup<br>Water inlet hole diameter: approx. 18mm<br>1 X Biochemical filter<br>2 X Sponge<br>1 X Suction cup<br /><img src="http://img6.eachbuyer.com/x1/p12/bk06_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x1/p12/bk06_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x1/p12/bk06_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x1/p12/bk06_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x1/p12/bk06_5.jpg" />