- [Buy 1 get 6 free accessories] the air stone kit includes a 4-inch Nano air disc stone, 1 control valve, 1 check valve, 2 suction cups, 1 tee connector, 1 reducer of connecting 8mm and 4mm. 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] 15.2oz/430g, easily sits on the bottom without suction cup. The diameter of air diffuser area is 4 inch, not including the plastic border, suitable for freshwater and saltwater
- [Driven by 4W or larger wattage air pump] the 4 inch airstone is compatible with 4mm or 8mm airline tube, the output air flow is 3L/Min. Please NOTE the deeper you put the air stone under water, you may need use a larger wattage air pump to drive it.
Pls noted: This product with different size in different model as below.