Please note that the air tube and air pump are not included. The air stone kit includes 1 Nano disc stone. 【Performance Updates】 The new air stone has 180 ultra small 100μm air holes, which can produce 500,000 bubbles per minute. It releases smaller, denser and more uniform bubbles and doubles the rate of oxygen dissolution in water, reduces CO2 and increases pH. 【Super Strong and Durable Air Stone】 Made of high quality white alundum and brown alumina, our air stone is fired at high temperature of 1300 °C. Its lifespan can be 2 to 3 years. The air diffuser area is exquisite, strong filtration and easy to clean compared to other aquariums. 【Quiet】 With high air permeability, the updated ventilation stone can push smaller and denser bubbles. When the bubbles burst in the water, the sound is quieter. The diffuser is suitable for freshwater, saltwater and hydroponic aquariums. 【Beautiful Decoration】 The air stone can create the atomizing effect, and the bubble beams make your aquarium like
