I didn't use any tannin or acid blend due to the lack of knowledge at the time of making. I did use 12 oz cans (typo). This was the first experiment to see if I would be interested in wine making,I'am hooked. I have a apple wine, from apple cider, on fermentation stage right now. I took it from Yooper's recipe and did it exactly to the recipe..today it will go to the secondary.