●【 Package Included for Aquarium Bubbler】: Includes a 1.97 inch nano air disk stone. 【Note: the air pump are not included.】It is best to soak air stones in the fish tank for two hours before use. ●【Ultra-High Dissolved Oxygen Rate】: The nano aquarium bubbler can release smaller, denser and more uniform bubbles which makes double oxygen dissolving rate in water. Ideal to increasing oxygen levels, lowering CO2 and raising PH in your fish tanks and hydroponic growing systems. ●【Driven by 1W or Larger Wattage Air Pump】: Air diffuser area at 1.97 inches, fit for 5 - 30 gallon freshwater and saltwater tanks. Note: The deeper in water, you may need to opt for a higher wattage air pump to drive it (air pump are not included). ●【Produces Small, Quiet Tiny Bubbles】: Fish tank bubbler diffuser releases compressed air into the water as tiny bubbles, sound is quieter, fine bubble and high dissolved oxygen. Adequate oxygen creates a friendlier environment for your aquarium pets. ●【High-Temperature Sintered Nano Materials】: Durable and dirt-resistant for long-term use. Low power consumption for energy savings and environmental protection. Notice: regular cleaning is recommended to ensure optimal performance.