ArticleCask Ale: Tips from Pros Cask ale, also called “real ale,” is naturally carbonated through a secondary ferment in the barrel. The beer is not filtered or pasteurized and is dispensed without the use of gas. We’veAlready a member? Log InWritten by BYO StaffYou'll Also Like Article MEMBERS ONLY Mini Kegs & Keg Alternatives Mini-kegs are an option for homebrewers looking to avoid bottling, but who don’t have the space for a full kegging system. Article FREE Introduction To Kegging Thinking about moving to a kegging system? Learn the pros and cons of kegging your beer, the required equipment, some of the basic carbonation techniques, and the key concepts for those new to draft systems.