Hagen Marina Deluxe Oval Bubble Diffuser Air Stone is an oval-shaped air stone available in both 3 and 5 inch sizes. When connected to an air pump, it produces a broad curtain of fine bubbles that not only look attractive but also improve the oxygen content in your aquarium water. The long oval design allows it to distribute bubbles over a wider area compared to small round airstones. This is great for larger tanks or to place behind ornaments – it enhances water circulation and provides extra aeration for fish health, all while creating a beautiful bubbling effect in the tank. Available in Multiple Sizes