?Buy 1 get 4 free accessories? the air stone kit includes a 2-inch Nano air disc stone, 1 control valve, 1 check valve, 2 suction cups. Please note air tube and air pump are not included
?Ultra-high dissolved oxygen? this upgraded Hygger air stone releases the bubbles more smaller, denser, uniform, which makes double oxygen dissolving rate in water
?Produces small & dense bubbles quietly? push out amounts of smaller and denser smooth bubbles than others, when the bubbles burst into the water, the sound is quieter. It can creat the atomization effect and bubble beams will make your aquarium like a fairyland
?Weighs enough to sink? 5.2oz/150g, easily sits on the bottom without suction cup. The diameter of air diffuser area is 2 inch, not including the plastic border. Suitable for freshwater and saltwater
?Driven by 2W or larger wattage air pump? the 2 inch airstone is compatible with 4mm airline tube, the output air flow is 1L/Min. Please NOTE the deeper you put the air stone under water, you may need use a larger wattage air pump to drive it.