Features:

Micro bubbles dissolve more oxygen into water and burst peacefully on the water surface. An abundant cascade of tiny bubbles is ideal for fish, betta, shrimp, and all kinds of aqua creatures.
Soak the stone bar completely in water 1 hour before use. Clean regularly by a brush as they get clogged after months of usage.
Come with an aquarium suction cup to avoid stone floated on the water.

Packaged:

1*air stone+1*suction