AQUAPAPA BB150 1.25" Bio-balls Filter Media for Aquarium Fish Pond Waterfall Fountain

Ready-to-use media bags, convenient for use with your canister filter, power filter, or fish pond filter. These Bio balls also help produce turbulent flow which helps with the gas exchange and increase dissolved oxygen level in water. Ball size: 1.25 inches in diameter. Mesh bag size: 8"x 5.5" Includes: 150 pcs bio balls in 5 bags. 30 pcs per bag. The mesh bag is zipper designed and reusable.