100pcs 18mm Biological Bio Balls Aquarium Fish Nano Tank Wet/Dry Canister Filter Media Black

Brand : OtherFeatures:Great for fish tanks, to promote gas exchange and increase dissolved oxygen levels.Great for tropical fish farms, koi ponds, waste water systems, etc.For use with wet/dry filters (here is not included), to improve biological filtration.Aiding in the critical gas-exchange process that is needed for successful biological filtration. Specifications:Color: BlackMaterial: Environmental PlasticQuantity: 100pcsDia: 18mm / 0.7inPackage Size: Approx. 21 * 14 * 2cm / 8.27 * 5.5 * 0.79in (L * W * H)Package Weight: 152g / 5.35ozPackage List:100 * Bio BallsSpecies : FishCategory Type : Cleaners