ALL-IN-ONE SOLUTION - This comprehensive pond aeration kit includes all the necessary accessories for effective pond aeration. The package contains 4 rolls of 30ft vinyl airline tubing, 4 air stones (2-inch diameter), 4 check valves, and 4 replacement air filter pads. ENERGY EFFICIENT - Designed to optimize oxygenation in ponds, this pond air pump operates at 8 watts, with a flow rate of 0.42 CFM (192 GPH) and an air pressure of 2.6 PSI (0.018 MPa). Ideal for ponds or water gardens up to 2000 gallons, the airflow can be easily adjusted using the dial on the top for customizable aeration. WHISPER-QUIET OPERATION - This koi pond aerator operates with minimal noise. The straight airflow path, textured internal housing design, and vibration-dampening rubber feet ensure quiet performance, maintaining a peaceful pond environment. DURABILITY - The sulfurized diaphragm enhances the pump's durability for long-lasting operation. Chrome-plated air outlets provide corrosion resistance, contributing to extended pump life. DUAL-FUNCTIONAL - This versatile pond air pump serves two purposes. It functions as a pond aerator and also helps prevent complete surface freezing in winter by maintaining water circulation, supporting fish respiration and overall pond health during colder months.