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Misting Fountain With Stainless Steel Misting fountain is a device that makes mist in ionic air purifiers. It uses no chemicals like dry ice; instead, it makes ultrasonic vibrations in the water itself. This changes the surface tension of the water - the force that allows tiny bugs or leaves to rest on top of the water rather than sinking; the lower surface tension causes some water droplets at the surface to escape into the air. So the mist you see is nothing but water, like natural fog or morning mist.
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