Penn-Plax Aqua-Mist Air Stone Cylinder, Green, 0.44 in, 1 ct

Healthy fish need water that moves, and the Penn-Plax Aqua-Mist Air Stone Cylinder is a simple way to make that happen. This green cylinder air stone measures 7/16 inch (0.44 in) and comes as a single piece, making it an easy add-on for most tanks. Penn-Plax describes the air stone as a necessary accessory in most freshwater and saltwater aquariums because it aids in water movement and gas exchange. It's a small part that plays a big role in your tank's daily rhythm.

• Compact 7/16 inch (0.44 in) cylinder shape fits neatly into tanks of many sizes.
• Green coloring blends into your aquascape while it works.
• Penn-Plax says it's a great way to aerate your aquarium.
• Aids in water movement and gas exchange, supporting a healthier tank environment.
• Hooks up to any aquarium air pump, so it works with the gear you already have.
• High pore design creates a cascading stream of bubbles inside your aquarium.
• Sold as a single (1 pk) piece, perfect for a focused upgrade or replacement.
• Suited to both freshwater and saltwater aquariums for flexible use.
• Sits low in the tank, tucking in among gravel and decor.
• An affordable, no-fuss way to keep oxygen flowing for your fish.

When it comes to aeration, the basics matter most, and this little cylinder covers them well. Connect it to your air pump, place it where you'd like the bubbles to rise, and let its high pore design send up that steady cascading stream. As a single-pack stone, it's ideal whether you're starting fresh or swapping in a new one for an established tank. The Penn-Plax Aqua-Mist green cylinder air stone is a quiet, dependable helper that keeps your aquarium's water moving and your fish breathing easy, one stream of bubbles at a time.