Penn-Plax Aqua-Mist Air Stone Cylinder, Green 12 ct, 0.44 in, 2 ct

Two is better than one when it comes to keeping your aquarium aerated, and the Penn-Plax Aqua-Mist Air Stone Cylinder 2-pack delivers exactly that. Each green cylinder air stone measures 7/16 inch (0.44 in), giving you a matched pair to use across tanks or to keep a spare ready. 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 simple, doubled-up way to support a healthier tank.

• Two-pack count lets you aerate a second tank or hold one in reserve.
• Compact 7/16 inch (0.44 in) cylinders slip neatly into many setups.
• Green coloring blends into your aquascape while each stone works.
• Penn-Plax says they're a great way to aerate your aquarium.
• Aid in water movement and gas exchange to support a healthier environment.
• Each hooks up to any aquarium air pump you already have.
• High pore design creates a cascading stream of bubbles inside your aquarium.
• Suited to both freshwater and saltwater aquariums for flexible use.
• A built-in backup means a worn stone never leaves you scrambling.
• A tidy, practical pairing for owners who like to stay one step ahead.

Having a matched pair on hand takes the guesswork out of keeping your tank aerated. Connect one green cylinder to your air pump, position it where you'd like the bubbles to rise, and let the high pore design send up its steady cascading stream while the second waits in the wings. As a 2-pack, it strikes a nice middle ground between a single stone and a bigger bulk supply. The Penn-Plax Aqua-Mist green cylinder air stone keeps your aquarium's water moving and your fish breathing easy, with a spare always close by for peace of mind.