Originally Posted by businesstime
The measurements of 3/4 corn (2/3 cane) are for 5 gallon batches. I know that my final batch will be less than 5 gallons due to hydro samples and other errors. If I end up with 4.5 gallons, should I adjust the solution accordingly? i.e.,
(4.5/5)*(2/3) = 0.6 cups cane
(4.5/5)*(2) = 1.8 cups water
Yes, adjust the amount of sugar based on the volume. The volume of water you use to dissolve the sugar doesn't matter so much so long as it's small and all the sugar dissolves in it. In fact I usually use less than a cup of water when I prime. If you have a scale that can accurately measure in ounces and tenths of ounces, you'd be better off using the weight of the sugar, but 2/3 cup is probably close enough.
Technically, you should also adjust based on the style of beer and fermentation temperature, but for you first batch you should be fine.