Spectrastone Special Black Aquarium Gravel for Freshwater Aquariums， 25-Pound Bag</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Will not affect PH</li><li>Safe for use in freshwater aquariums</li><li>Non-Toxic coating</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/51n5j9M%2B3EL.jpg' noproxy></br>