Aqua-Life Products run so quietly you'll forget you are aerating your bait. You'll know you are by the healthy condition of your bait. Aqua-Life products feature a whisper quiet motor that runs efficiently at a low volume. Aqua-Life products also utilize a special micro-bubble oxygen diffuser that produces clouds of tiny bubbles. Smaller more numerous bubbles mix readily as they collide and dispense through the entire water column.