Am racking my first try at winemaking today. I'm dealing with one gallon that is ending it's primary fermentation and was planing on racking into a second gallon container for secondary fermentation, but of course by leaving the junk behind, my "wine" will not come close to filling this second gallon jug. I understand oxygen spoils wine so what should I rack into??? a smaller container? should I add something to bring the wine up to the neck of the jar? or is it okay to leave that void in the second gallon jug? Thanks for your assistance.