Definitely. For a 5 gallon/23 liter carboy, I try to fill within 3"/7cm of the stopper.is there such thing as too much head room in the secondary fermentation jug?
Both. When I'm ready to bottle, I record the SG. Why? It's habit, I record SG every time I touch the wine. Most of the time it won't matter (except for first and last), but on occasion it's helpful -- if you recorded it.When the time comes to bottle(a while away yet I know),should I be testing the SG or taste testing ?