Penn-Plax Aquarium Airstone Cylinder, 2 pack, 7/16-in

Penn-Plax Aquarium Airstone Cylinder. When added to your aquarium, it produces a steady flow of bubbles, providing a better supply of oxygen to your fish. It attaches easily to any air pump with standard 3/16" airline tubing (sold separately). The air stone can be positioned anywhere in your tank, either blend it in with surroundings or hide it under gravel.

Key Features:

• Increases surface agitation
• Accelerates oxygen replenishment
• Helps release carbon dioxide buildup

Penn Plax is a manufacturer of top aquatic supplies and decor. We specialize in creating excellent pet products for animals both great and small.