Fired by high temperature so as to encourage the growth of nitrifying bacteria.<br />Anti corrosion and provide water of the premium quality for your fish tank.<br />No more hesitation， get one now.<br />Color: Brownish red <br />Dimension: 1.6 cm of length x 1.6 cm of dimeter<br />Net weight: 250g <br />1 bag x Filter media ( 250g )<br /><img src="http://img6.eachbuyer.com/x7/p71/v762_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x7/p71/v762_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x7/p71/v762_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x7/p71/v762_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x7/p71/v762_5.jpg" />