CNZ 1.25-inch Bio Ball Filter Media for Aquarium Fish Pond Waterfall Fountain (5-pack， 150pcs)<div style="text-align: left;"><strong>[Product Information]</strong><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. Mesh bag size: 8"x 5.5"</li><li>Includes: 150 pcs bio balls in 5 bags. 30 pcs per bag. The mesh bag is zipper designed and reusable.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51tmnojgKcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/516SEE9C9yL.jpg" noproxy>