Hey...just posting a little follw-up on methods to stop fermentation before the must hits 1.000 or less. I just racked another batch of two-week ginger mead to a carboy for cold-crashing, so I had a 3 gallon carboy of yeast sediment available for something new. Reading this thread put me in a mind for making a quick cider, so I bought three gallons of apple juice in the refrigerated section of the grocery store. I was shopping without eye-glasses, and could not read the label, so I took it that juice that needed chilling would be nothing but juice...WRONG! The juice has potassium sorbate...and I should have known better because in the past I have had frozen raspberries sit in the crisper of my fridge and ferment from the wild yeasts that were on the berries...so duh, apple juice could have the same thing happen.
Anyway, what the hell, I had the juice and a carboy with a healthy yeast cake, so in went the juice...and just for good measure a packet of fermentis saflager W34/70.
Three days later and it's fermenting along quite nicely...dropped from 1.048 to 1.038 already, which goes to show you that potassium sorbate does not "stop" fermentation...just reproduction of the yeast.
So what do I do to ensure this ferments out? I've made up a 1 quart starter using some honey...if the cider appears to slow too much, in goes the starter with just enough left behind to add more honey and have a follow-up starter, and so on. But I really doubt I'll need to add much more yeast to bring this down to 1.008 or so. (follow-up: 6-25-2010 gravity reads 1.020, yeast still eating away, airlock bubbles every 5 -10 seconds, no additional starter added)
When it hits 1.008, I'll rack it onto about 1 dozen finely crushed Granny Smiths and cold crash it...hoping to add some tartness and apple complexity. (I live in Savannah, GA...I think I once saw an apple tree around here, but it had sad looking blotchy apples, and only a very few at that...so freash-pressed apple juice is a twelve-hour round-trip drive kinda thing for me...so cider is not so big around here as a home-made alcohol delivery system)
Kevin, how about a little advice for me on where to stop my gravity and have a nice semi-sweet cider?