This Carbon filter system is a specially formulated filter cartridge with no powdered granules making it easier to use. This filter is ideal for filtering inexpensive commercial vodka to prepare it for use with the Still Spirits flavorings. We filtered some Potters Vodka then in a blind taste test our tasters liked the filtered vodka better by an 11 to 3 vote. So this is a great way to make inexpensive vodka better! The system includes the two 10 liter (2.5 gallon) plastic buckets shown along with one carbon cartridge and the cartridge assembly. The filter attaches to the bottom of the top bucket. You simply attach the carbon filter to the bottom of the top bucket place it on top of the bottom bucket. First run about 2 gallons of water to remove any carbon dust or recirculate if you are filtering water. Now fill the top bucket with your spirit diluted to 40% alcohol or your water. This system filters 3 liters of vodka in about 20 minutes and water about twice that fast. Each cartridge will filter approximately 10 liters of 40% alcohol or 300 liters of water. One carbon filter cartridge is included with this sytem.