I took a flash light and put it on the backside of the carboy. Seemed like a great way to check clarity of such a dark colored wine. One you could see the light a quarter of the way down the carboy then it went out. The other you could follow the light clearly all the way to the bottom. Elderberry wine looks ready. Any sugestions on what to us for back sweetner. How long to let it sit before its ready to drink?