Tonight I'm fermenting my first batch of cider. Doing a 1-gallon batch using juice I bought from the Hudson Valley. I'm going to ferment using Nottingham dry yeast and split between 2 growlers. I took a gravity reading, and it's only 1042, which seems to be pretty low based on what I've read. Is it worth it to add some sugar to the mix to boost the gravity, or should I just ferment as is? I'm going to carbonate it, and I was looking to make a style that was off-dry/semi-dry, basically in the English style.