① ALL-IN-ONE SOLUTION - This comprehensive pond aeration kit includes all the necessary accessories for effective pond aeration. The package comprises 4 rolls of 30ft vinyl airline tubing, 4 x air stones (diameter 2), 4 x check valves, plus 4 x replacement air filter pads. ② ENERGY EFFICIENT - Designed to optimize oxygenation in your ponds, this pond air pump operates at a power of 8-Watt, with a flow rate of 0.42CFM (192GPH) and an air pressure of 2.6PSI (0.018Mpa). Suitable for ponds or water gardens of up to 2000 Gallons, the air flow can be easily adjusted using the dial on the top, allowing for customizable aeration. ③ WHISPER-QUIET OPERATION - Experience tranquility with this koi pond aerator, as it operates with minimal noise. The straight airflow path, textured inside-housing design, and vibration-relieving rubber feet contribute to silent operation, providing a peaceful environment for your pond. ④ DURABILITY - The sulfurized diaphragm of this pond bubbler enhances its durability, ensuring long-lasting performance. Additionally, the chrome-plated air outlets are corrosion-resistant, further contributing to the pump's durability and longevity. ⑤ DUAL-FUNCTIONAL - This versatile pond air pump serves a dual purpose. Not only does it work as a pond aerator, but it also functions as a pond deicer during winter months. By creating a ventilation hole, it allows your koi to breathe and ensures their well-being even in colder temperatures.