Hi I am making my first wine. It is a plum wine. I would like to know at what stage do I stop the fermentation with the powder and the campden tablets please? The 4 gallons has been in the barrel for 4 to 5 days and doesnt appear to be letting out a gas bubble from the air lock all though when I stir it as I have been doing daily as advised in the recipe it is still fizzy on top. Is there a figure a hydrometer should read that tells me to move on to the next stage of moving the liquid into another bucket with the fermentation stopper and the campden.