Fine air bubbles and provides continuous oxygen to your fish, it can create the atomization effect and the bubble bundles will make your aquarium a fairy paradise. Available for aquarium within 50cm.Please immerse the air stone in the aquarium for 2 hours before use. The aquarium air stone has a suction cup which provides a strong grip for the aquarium air stone on the aquarium. It creates an ultra-fine bubble stream, the air stone releases smaller, denser, more even air bubbles, help fish to swim happily in the fish tank, fish tank, koi pond. Adds oxygen circulation to your aquarium and when added to a hydroponics system energizes the solution growth while aerating and circulating nutrients.