1. Aquarium Air Curtain suitable to be used for decoration and Oxygen supply in all kinds of aquariums. 2. This Fish Tank Air Curtain can be formed into almost any shape and create a impressive wall of bubbles in your aquarium. 3. This porous rubber hose with good softness, and any shapes required can be made. 4. It's bubble disperse equally and supply is excellent.creates an uninterrupted flow of bubbles. 5. Can help your aquarium by providing water movement and aeration. 6. This Aquarium Bubble Wall is suitable for fresh or salt water.