I found a recipe that calls for 4.5 gallons of water to 6 pounds of malt syrup and 3/4 cup of corn syrup. 1 US gallons = 3 785.4118 milliliters, 1 gram = 0.00220462262 pounds and 1 US cups = 236.588238 milliliters. So if I add the malt syrup and corn syrup together, that's ... Oh, I give up. I think I'll just take the fact that the 454 grams are 1.022etc pounds, this recipe calls for 4.5 gallons water to 6 pounds of malt syrup, 1.022etc pounds is almost 1 pound so let's say 1 pound, which is 1/6 of 6 pounds so 1/6 of 4.5 gallons is ................. 2839 milliliters! More than twice as much water as I used. Which is what I was beginning to expect because it was so thick and dark. I shall have to wash out two more 1-litre jars and I think I shall add 1200 more mls of water..