As it's so quiet no one will know it's running, the Lifegard Aquatics Quiet One 2200 Fountain Pump is quiet enough for your Zen meditation garden. This fountain pump is also energy-efficient as it generates more power using less energy. Included is a prefilter grill with flow control. Internal recirculation ejects debris and keeps it from overheating. Impeller technology provides combined rotors, improved shaft materials, and corrosion-resistant bearings. EZ-access covers on this fountain pump make maintaining the rotor, shaft, and removable impellers easy. Cooling chambers provide air-cooling during dry use and water-cooling in wet applications.