Fine air bubbles and continuously supplies your fish with oxygen. It can produce the atomization effect and bubble jets make your aquarium like a fairyland. Available for aquarium within 60-200cm. Please immerse the air stone in the aquarium for 2 hours before use. The aquarium air stone has a suction cup that provides the aquarium air stone with a strong hold on the aquarium. It makes a super-fine flow of bubbles, the air stone releases air bubbles smaller, denser, more evenly, help fish swim happily in the fish tank, fish tank, koi pond hydroponic growing system, it energizes the growing solution while aerating and circulating nutrients.