Check the listing for details. 100 pcs 1" Bio Balls Aquarium Fish Reef Pond Media Filter FREE Media Bag.. Condition: New. Listed at 9.99 USD. 100 pcs Aquarium 1" Bio Balls FREE Filter Bag Included. Ready-to-use Bio Balls.For use with your Canister filter, Power filter, Corner filter or Pond filter.Comes in two filter media bags with 50 bio balls in each bag.Bio balls work great in Canister, Corner, and Pond filters. They provide a great surface area where crucial beneficial bacteria can form in order to give your fish the optimum health conditions they need.Bio balls convert and remove harmful toxic waste including ammonia and nitrates that are harmful to all fish health.BIO-Balls do not require replacement unless damaged or destroyed.Great for both Fresh and Salt water tanks.FASTEST SHIPPING ON EBAY!!!! Dimensions:Bio ball diameter – 1 inchMesh bag size: 8” x 6" Packages include:100 pcs Bio balls2 mesh bags with 50 Bio balls in each bag.Mesh bags come with zipper style top and are reusable.