Flat and round design: maximizes the outlet surface of the air stole to provide a larger bubble surface. Made from high quality carboorundum, it has a strong gas permeability , uniform air bubbles and a high rate of dissolved oxygen. Benefits: Increases the flow / circulation of air to oxygenate water and improve the health of aquatic life. Ornamental: Add beauty to your aquarium with this round air stone to create microbubbles. For continuous effective use, clean the disc regularly. Features: Color: gray Material: Sandstone Diameter: 13cm Package Included: 1 * Round stone disk for diffuser Oxygenation
