CNZ 1.25-inch Bio Ball Filter Media for Aquarium Fish Pond Waterfall Fountain (1-pack， 100pcs)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Ready-to-use filter bags， convenient for use with your canister filter， power filter， or fish pond filter.</li><li>They provide large amount of surface area in a small space where lots of beneficial bacteria can form on the surface. These bacteria can help convert and remove toxic waste like ammonia and nitrites in your tank</li><li>These Bio balls also help produce turbulent flow which helps with the gas exchange and reduce toxins.</li><li>Ball size: 1.25 inches in diameter.</li><li>Includes: 100pcs bio balls in 1 bags. The mesh bag is zipper designed and reusable.</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/51mB-gYIEFL.jpg' noproxy></br>