Working principle: <br />Biochemical sponge filter is motivated by air pump. It has large gas lift power and no noise pollution. It can improve dissolved oxygen in water and combine with mechanical filtration. It adopts biochemical filter principle and multilayer filtration to foster high density nitrifying bacteria therefore to reach the goal of clean and stable condition water.<br />Advantage:<br />1. Improve dissolved oxygen in water<br />2. No noise pollution, energy saving<br />3. Can use together with roung cylinder, external hanging, top filter machine to do precise filtration.<br />4. Cylinder shape sponge filter can wholely filter the water<br />5. Multilayer sponge design that can be cleaned repeatly and doesn't affect the water quality even if you transfer the fish tank<br />6. Flexibly compatible with all kinds of accessories<br />Name: aquarium bio filter<br />Model: XY-2830<br />Dimension: 15 x 10 x 4.5 cm ( length x height x width )<br />Sponge height: 8 cm<br />Sponge diameter: 4.5 cm<br />Note:<br />It can be used when connected with oxygen pump to reach effect of filtration and improving oxygen dissolve.<br />Suitable for mini fish tank to nourish apistogramma, small fishes.<br />1 x Sponge filter<br />1 x Suction cup<br />In original package<br /><img src="http://img6.eachbuyer.com/x21/p10/bh952_1.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x21/p10/bh952_2.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x21/p10/bh952_3.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x21/p10/bh952_4.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x21/p10/bh952_5.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x21/p10/bh952_6.jpg" / noproxy>