Chauvet Pro QDF Quick Dissipating Fluid is a specially formulated water-based fluid for CHAUVET Professional Vesuvio and Geyser foggers. It produces a dense fog effect that disappears quickly, supporting repeated bursts and momentary atmospheric effects without obscuring sightlines. The non-toxic, non-flammable, and unscented formula leaves no residue or stains. Net contents are 1 gal (3.8 L).