If you decide to make a zakwas starter you need to purchase dark rye flour. - Put 7-8 tablespoons of rye flour into the jar - Pour in the flour with 16 oz of water - Cover the jar with gauze or cloth and set aside for 4-5 days (remember to stir one or two times a day) - You can store it in a refrigerator, in a closed jar, for up to two weeks