Boyu Airstone[Length - 4Inch]

Mineral Sand Air Stone Bars Available Sizes: 4 / 6 / 8 / 12 inch Perfect for creating an air bubble curtain that increases oxygen in your fish tank Made from compressed mineral sand provides fine and constant aeration to your tropical fish tank Mineral Sand Air Stone Bars Available Sizes: 4 / 6 / 8 / 12 inch Perfect for creating an air bubble curtain that increases oxygen in your fish tank Made from compressed mineral sand provides fine and constant aeration to your tropical fish tank