Rosa, you could leave the wine in your primary, as Geronimo points out, but make sure you snap down the lid very tightly when the SG hits around 1.020-1.030 and install an airlock in the lid. There are two stages to fermentation, aerobic ("with air" or primary) and anaerobic ("without air" or secondary). They both can be done in the same vessel if you so choose. I do it both ways and I don't see a major upside to either one other than a little less work in leaving it in the primary vessel vs. getting off the "gross lees" in going to the secondary vessel. Since you are working from juice, you should not have appreciable gross lees.
Yes, Rosa. That is what I have done on occasion, particularly when there is not a lot of sediment. Since you were using grape juice, I don't imagine you have a lot of sediment. Snap down the lid with an airlock installed and watch the airlock to see when fermentation has stopped for about three days in succession. At that point the wine should be dry. If you are fortunate enought to have a spigot you can rack the wine from the fermenter through it into a carboy. Remember to remove the airlock before opening the spigot or you will draw the liquid from the airlock into the primary.
Rosa, I would not snap the lid down and add an arilock in the first stage, i.e. from starting SG to about 1.020. From that point on, which I consider the secondary stage, I would add the airlock and snap down the lid.
You would be looking for the end of fermentation, i.e. when there was no more evidence of conversion of sugar to alcohol and CO2. Once the airlock stops its bubbling activitiy for three consecutive days, your wine should be completely fermentetd to dry. Open the air lock and check the SG. It should be well under 1.000. At that point you could rack it into a carboy, sanitize and stabilize with K-meta and K-sorbate, add clarifiers if you choose to and allow to completely clear. Back sweeten if you feel you need to and then either bulk age in the carboy or bottle and allow to age in the bottle.
It does not seem to be coming down very fast. Make sure you give your hydrometer a little spin when you put it in the wine to make sure that bubbles of CO2 are not bouying it up. I would let it get to 1.030 or less and then rack it into a carboy. You may be coming up on a stuck fermentation and it may stop around 1.010 or so. You might want to consider a yeast energizer when you rack.
I just bought some Welch's Grape Juice frozen concentrate to make a 5 gallon batch. Can I start this in a carboy or do I need to start this in a primary bucket?
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