|Create the illusion of fog by simply placing the unit in regular tap water. Multi color fogger changes from red to yellow to blue. Works best in shallow water, 1.5" to 2" of water is best, although it will work in up to 4" of water. Fogger will ultrasonically vaporize about 1 quart of water in 4 to 5 hours. Fog Mister Maker includes IV and UL approved adaptor, fogger unit and mist deflector.