Red Sea Fish Pharm ARE40261 Max Filter Sponge Media for Aquarium Filter</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Matrix Carbon Is A Truly Unique Activated Carbon</li><li>It Is Formed As A Spherical Bead For Optimum Hydrodynamics And Will Not Pack</li><li>Permits maximum water flow and contact with its high density of macro porous binding sites</li><li>Matrix Carbon Has A Very Low Ash Content As Indicated By Its Minimal Impact On Ph</li><li>Even When Added To Distilled Water， It Does Not Raise Ph Above 7.0</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/61clRZzMDSL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31djVVy3QaL.jpg' noproxy></br>