I have 5 gallons of perry that came out a bit lacking in pear flavor. We want it sparkling and dry. So to add some flavor, I bought some pear extract. I have 3, 1oz bottles. Any advice on how many ounces for 5 gallons? I am thinking I will start with 1oz in the keg, give it a slow roll and then wait a day to taste. If it isn't enough, then I will add a 2nd ounce.