The problem is that I made a solution of 8 cups of water with ~1 cup (20 ounces per my scale) of corn sugar. So, to each 4 gallon bucket of cider, for a total of five 4 gallon buckets(20 gallons), I planned on adding 2.5 cups of solution. After I added 2.5 cups to 3 of the buckets, I only had 1.5 cups of solution left. I think I only ended up with 9 cups of total solution, with a 3 cups of vapor boiling off the top when making the solution.
This is where I got my calculation of 1.37 ounces of corn sugar per gallon of cider.
Do you guys know if this is too much sugar?