ArticleEvaporation Clarification, “Big” Reds, and Mold MaladyWritten by Alison CroweRemember, every time you open your barrel, you introduce air and potentially some undesirable spoilage organisms.Already a member? Log InYou'll Also Like Article MEMBERS ONLY Perfecting Pyment, Vinifera Vines, and Over-Yeasting . . . you could also buy some powdered grape tannin, use oak chips, or even use a cup of strong black tea to add some tannin backbone to the wine if it’d be tough for you to obtain grape skins. Article MEMBERS ONLY Making Muscat, Battling VA, Finding Ideal SO2 Levels No matter which strain you use, be sure that you read up on all the specifications from the manufacturer around ideal performance conditions.