wade took the words out of my mouth, I have found that the amount of sugar in a written recipe to be more of a suggestion, or even an acknowledgment that you in fact need to add sugar. lol
Also the pectic is usually used 1/2 -1 tsp per gallon, so you may want to use a little more. but the best bet is to freeze them for a day first (if not already frozen

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How many gallons are you attempting to make?