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How many pounds of grapes do you have? Plan for 1 gallon of must from 10 pounds of grapes. This is overestimating, but it ensures your fermenter is large enough to handle it when the cap rises during fermentation. FAR better to have too big a primary fermenter than too small. Take that advice on faith!
Following is a generic procedure:
Ferment the grapes to an SG between 1.000 and "done". Fermentation typically finishes between SG 0.990 and 0.996. I'm leaving out advanced techniques as this is your first wine. KISS is a necessary to help ensure you have a successful finish.
Press the pomace and put the wine into carboys. If the SG is 0.998 or higher, leave several inches of extra headspace as the wine is not done fermenting.
Let the wine set 7 to 14 days. Fermentation will complete and gross lees (sediment that is mostly grape solids) will drop. Wait until the gross lees starts to compact (level grows higher, then drops as the lees settle). Rack the wine, leaving the sediment behind. Note that 5% to 10% of your volume may be gross lees, so after racking the volume will be less.
I tilt the carboy and don't worry if I suck up a bit of sediment in this racking. One goal here is to not throw out good wine. The sediment (gross lees) will settle and you'll eliminate it later. I pour the loose sludge into a bottle and refrigerate for a week -- if Dionysus is with you, you might recover half the bottle in clear wine. Carefully pour the wine off the sludge and preserve it.
At this point I degas by stirring the wine for 3 minutes, changing direction every 30 seconds. This causes the wine to emit a lot of dissolved CO2 -- the wine clears faster with the CO2 gone. Degasssing is not necessary, but IMO the wine clearing faster is good.
At this point you want less headspace, 1" to 2" from the stopper. Put the remaining wine in containers small enough to eliminate excess headspace.
I add 1/4 tsp K-meta for each 5 to 6 gallons of wine
at each racking.
The next racking is a judgment call. After 3 or 4 weeks, look at the sediment. If it's a dusting, do nothing. If it's more than a dusting, rack the wine. Tilt the carboy so you toss less wine out. The "dusting" is fine lees, which is mostly yeast cells. It's ok to leave in and remove it later.
As before, I pour the remaining loose sludge into a bottle and refrigerate. The sludge will settle and you can pour the wine off the top -- if there is enough to do so.
After that, add K-meta every 3 months. Rack the wine only if there is visible heavy sediment.
This is an abbreviated set of instructions -- for a beginner, information overload is a real thing so I'm trying to keep this as simple as possible. While there are other choices, this will get you through the first wine with a satisfactory result.
The following picture is current carboys:
View attachment 76525
For small bottles, I have a variety:
View attachment 76526
I use a screwcap ONLY if fermentation is 100% done, and turn the bottle upside down to detect leaks. If it leaks, I move the wine to a different bottle and recycle the leaking one.