CNZ Aquarium Natural River Gravel</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Aids in propagation of beneficial bacteria</li><li>Adds depth and beauty to aquariums， water gardens， ponds and terrariums</li><li>Made by nature river pebble stone， average size: 3-5mm</li><li>Safe for use in freshwater and marine environments</li><li>For optimum results， use 2 lbs. of gravel per every one gallon of water</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/51cqL0-vbeL.jpg' noproxy></br>