Penn-Plax

The Aqua-Mist Air Stone is a 1 3/16 inch (3cm) green colored aerator for your tank. When added to your aquarium, it produces a steady flow of bubbl...

The Aqua-Mist Air Stone is a 7/16 inch (1cm) green colored aerator for your tank. When added to your aquarium, it produces a steady flow of bubbles...