Re: Oops
Dmntd said:
I put 2 fresh packets of yeast in a cup of water and let it sit a couple of days, last night I pitched that into 3 quarts of the must in a gallon jug. This morning theres about 1/2" of foam on the must in the gallon jug. Any thoughts as to how long I should wait before adding this to the rest of the must?
Anthony
Anthony,
Sorry, I should have explained what a yeast starter is. Basically, you want as big and as healthy a population of yeast cells as you can get with which to inoculate your damaged must. Ideally, what you would have wanted to do was rehydrate the yeast in the cup of water for fifteen minutes or so, then pour that into your gallon jug along with a fresh sugar source. In this case, you might have wanted a half cup of honey dissolved in a quart of water, along with some more nutrients (too many nutrients can lend off-flavors to the must, but half a teaspoon wouldn't hurt anything, and besides, this is an emergency). Some people would say that several quarts is a better starter for five gallons, with the rationale being that if a little is good, then a lot is better. They might be right, but I've had good luck like this. You shake or stir this up really well, then put an airlock on this jug. Set it in a warm place for 12 to 24 hours. You should have plenty of activity by this point, and a booming population. Once you see that you do, you pitch the entire quart of healthy starter into the big fermenter, and cross your fingers.
You say that you're seeing foam at the top of the jug right now? Personally, before you add anything else to the main fermenter, I'd wait a day or two and see if you get any action in your gallon jug. Since the must you used for this multi-quart starter has the dreaded sorbate already in it, this will be the test you need. If the yeast can't make a go of it here, then they wouldn't do well in the big fermenter either. Oskaar has a valid point about airborne nasties maybe having set up shop in the rehydration cup. For that reason, it would be something of a crap shoot to add the starter you're currently brewing to the big batch. Personally, I think I might try it -- but I'm the passionate sort, and often let my emotions take control (not always for the better). A smarter approach might be to make a fresh starter and inoculate your main fermenter with it, and let the gallon jug ferment on its own. You'll be able to see, then, if you had any microbial hitch-hikers in there -- albeit, at the end, when it really doesn't matter any more.
-David