Tetra Whisper Non-UL Air Pump for Aquariums is designed to keep your deep-water aquarium’s oxygen levels high， ensuring your fish stay healthy and happy. It provides reliable functionality at an economical cost， with the quality marine enthusiasts have come to expect from Tetra. Its unique dome shape， integrated sound-dampening chambers， rubber feet and suspended motor actually flatten sound wave frequencies for quiet， reliable performance. Efficient and easy-to-use， these pumps can handle the aeration needs of aquariums from 10 to 100 gallons.