The Frabill Aqua-Life Premium Portable Aerator runs so quietly you will forget that you are aerating your bait. This aerator features a whisper quit motor that runs efficiently at a low volume. Frabill also utilized a special micro-bubble oxygen diffuser that produces clouds of tiny bubbles. The smaller more numerous bubbles more readily mix as they collide and dispense throughout the entire water column. The smaller bubbles are less damaging to fragile baitfish in smaller bait containers. The Frabill Aqua-Life Premium Aerator effectively aerates up to 15 gallons of water.