Lifegard Aquatics ARP440110 Quiet One Aquarium PRO Series 2200 Pump, 594 GPH Extremely quiet operation noise level models 200 up to 6000 less than 45 decibels Patented uni-direction impeller eliminates need for noisy mechanical device Allows pump to always turn in the correct direction immediately Innovative cooling chambers provide air-cooling during dry use and water cooling in wet applications Comes with 0.60-ampere and 1-inch in and out MPT