100 gallons, approximately.
Thanks for the article John, it was excellent. Quoting Farley, "Dosing vinegar is similar to dosing ethanol except that vodka has more carbon in it than vinegar. The ratio is about 8 times more carbon in 80 proof (40% by weight) vodka than vinegar (which is usually 5% organic by weight). For a conservative method one may use the same guidelines for dosing ethanol in the article below, except use 8 (eight) times as much vinegar as ethanol for the 40% ethanol directions:"
This is how I calculated the 15ml. Besides, I don't really want to do the vodka...might get into one of those "one for you, one for me, one for you..."
Thx, all