What volume measurement markings are visible in the Conical Fermenter? Kim June 17, 2020 16:10 Updated The measurements are in both Litres and US Gallons 15 L up to 25 L 4 US Gal up to 7 US Gal Related articles What is the maximum boil volume on the G30? What are the minimum recommended batch sizes with high gravity beers on the G70? What's the difference between the GF30 Coat and the GF30 Jacket? How accurately does the wall mounted thermometer represent the temperature inside the Conical Fermenter?