Wade, I am doing a 5 gallon batch. I had it broke down by the gallon. With the black berry in my original recipie it didnt call for tannin but I still gave the 5 gal batch a teaspoon. Ill start my new thread on it soon.yes, thats the best bay to do it so that you can use it to research it in the future if needed and it also help us keep up with it. How big of a batch are you doing. The recommended lbs per gallon for most on this is 6 per gallon or more.