During Halloween I turned my machine on around 5pm and ran it until about 9/9:30 pm. I had to refill the fog solution once and the Bubble solution three times. I own two machines and both bubble reservoirs have a slow leak to them, but the reservoirs are also very small so if your machine does not leak then I would say you have to fill it up at least twice. I bought the fog solution in a gallon container so that lasted and I have plenty so spare. I went through about 1 1/2 quarts of bubble juice.
1 year, 10 months ago