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#1 Posted : Monday, March 12, 2007 7:11:36 AM(UTC)
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Yikes!!

I just had 10 packs shipped this morning for use in rum as per Ricks advice to us.

I am wondering if the gravity was too high, as some yeasts can't handle a high OG, and the sugar or molasses has to be added in stages. I would certainly give them a call and get their recommendations
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#2 Posted : Monday, March 12, 2007 7:29:47 AM(UTC)
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JOHN,IF YOU KEEP IT UNDER 1090SG, YOU WILL BE OK.
LOWER IS BETTER, TO KEEP THE YEAST HAPPY,SO IT DEPENDS ON HOW MANY TIMES YOU WANT TO ADD SUGAR.
YOU CAN DO YEAST NUT. IN STAGES FOR BETTER RESULTS ALSO.
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#3 Posted : Monday, March 12, 2007 8:18:29 AM(UTC)
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Thanks Wineo, I guess its the SG then, I'll water it down and see if there is any change.

Tell me how it goes for you when you pitch it John!
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#4 Posted : Monday, March 12, 2007 8:40:43 AM(UTC)
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ALEX,the only time ive used the w/d yeast is on a corn+grain mash. its not a turbo,so it does'nt have any nutrents in it.have you put any yeast nutrent in there? if you havent,you should.it will help the yeast.you can use some malt extract,its got alot of nutrents in it.i use the dried kind{D.M.E.}.disolve it in some of your must and boil it for 15mins. cool it off to under 100f and add it back in the fermenter. warming up the mash will help too!
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#5 Posted : Monday, March 12, 2007 9:03:14 AM(UTC)
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Alex:

Hey, I have to bust in here, I don't believe it's the OG. Yes it is true that a very high gravity will eventually kill some yeast but I would be highly surprized if that will stop it from even starting. This stuff is supposed to ferment up to 18%. One has to have a high gravity to get that much output. Also I thought Rick said this stuff already had nutrients in it, and besides that the molasses should have plenty of nutrients to make yeast happy. It does say that this strain takes 10 to 14 days to ferment. Maybe you have to give it s little longer. I would put it somewhere where it is about 72 degrees and give a couple more days.

I'm with you guys, I was planning to use that stuff in my next rum. I do not think 1.15 is an unresonably high OG. I will be watching this thread closely, keep posting as you go.

Cheers
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#6 Posted : Monday, March 12, 2007 9:09:31 AM(UTC)
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Wineo,

What Alex used is pot distillers yeast which is a turbo, and is supposed to handle 18%. But, I think he may have exceede that with a OG of 1.15? and with the molasses adding some weight also?
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#7 Posted : Monday, March 12, 2007 9:10:55 AM(UTC)
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alex,i wouldnt do anything to it besides warming it up,and adding some neutrents.{paitence grasshopper}
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#8 Posted : Monday, March 12, 2007 9:13:55 AM(UTC)
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Thanks Elricko, I hope its something simple. That stuffs expensive.
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#9 Posted : Monday, March 12, 2007 9:14:13 AM(UTC)
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john,i didnt know it was a turbo,just thought it was yeast and ag.
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#10 Posted : Monday, March 12, 2007 9:27:52 AM(UTC)
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Thanks guys, I appreciate all the input.

Elricko, my gut feeling is the same as yours. Simply too cold, I have an external aquarium ambient heater; I"ll warm it up to the low 70s and see if it starts up. I would wait even longer but there is NO sign what so ever of any activity. And with all the repeated warnings on the label ,and the online info, that this yeast should remain relatively cool, it"s making it a hard toss up.
This being an 18% turbo, I didn"t think a 1.15 was too much for it to handle, though I"m at a bit of a loss.

John, yup, molasses adds gravity as well, it"s basically a sugary syrup.

Wineo, pitching in some nutrient was actually rather tempting. Though the reason I used this yeast in the first place was because its nutrient balance is already set for a more flavorful fermentation. The reason I actually stopped using turbo48 on the rum was because the distilled nutrients gave off an ammonia like smell that takes quite some time to age out.

Going to heat it up a bit tonight and will post the findings.
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#11 Posted : Monday, March 12, 2007 9:48:52 AM(UTC)
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Wineo, You are right about the w/d not being a turbo. I have 10 packs of that also in my order, for use with grains. But the pot distillers yeast is a turbo, and is aimed towards fruits, schnapps and such. Rick said it was ideal for rums, so odered 10 of those also, its more expensive, so hope its not an oops! I could always use it this summer with fruit.
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#12 Posted : Monday, March 12, 2007 10:47:08 AM(UTC)
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Providing you did not rehydrate the yeast ,I have to mention it, as some homebrewers do so automatically, and it will almost guarantee dead yeast, as the nutrients overpower and kill the yeast,, then we have to assume either too high of a pitching temp ,which you ruled out,, too cold to get started ,possible,, or an SG too high. If simply warming the wash does not get it started ,incidentally, stir it well after it warms up,, then stir well to disperse the yeast and pull about a gallon aside, then dilute to about 50%. If it takes off, then the mixture is simply too heavy.
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#13 Posted : Monday, March 12, 2007 11:12:27 AM(UTC)
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Nope, didn"t rehydrate, I"ll run the 2 tests. Good call on taking a gallon aside.
Thanks Rick.
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#14 Posted : Monday, March 12, 2007 4:09:21 PM(UTC)
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Today was a bit warmer ,in the 80s,, walked to the fermenter and the water in the bubbler was still level, no internal pressure. When I opened the lid there were light activity bubbles on the surface, the yeast seems to at least be alive.

Placed the fermenter in warm sink water and raised the temp to 25 c ,77f,. The yeast seemed to become more active, and now, an hour later, is active enough to very slowly push gasses out of the bubbler.

The watered down solution is still showing zero activity.

Still nothing close to aggressive or very active yeast, but it might only now start multiplying.

Either this was a case of temp, or simply a VERY slow start due to OG.
Still, at 25c this yeast should be working at far from optimum, though that"s for a fruit mash base, not sure if I need the same fermentation complexity for brown sugar and molasses.


I"ll keep posting if there is any change in activity.
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#15 Posted : Monday, March 12, 2007 5:10:35 PM(UTC)
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Alex, So sorry you are haveing this problem, and so sorry for myself as well.

In close to a hundred ferments, I ;have never had a stuck fermentation. I once prepared 6 25L ferments, all exactly the same, yet had one that was totally inactive. All the rest were jack hammering, and this one was dead. After 3 days I opened it and not much visable action, checked the gravity, and it was down to 1033. Put the lid back on, and soon airlock was equivalant to all the others, and later died at same time. A miniscule air leak fooled me that time.

I just can't imagine what is going wrong with yours, unless the molasses had a prservative in it.

Hopefully, we will find an answer and a sollution soon.
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#16 Posted : Tuesday, March 13, 2007 1:44:28 AM(UTC)
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We often see fermenters lose their seal, and much ,sometimes all, of the gas escapes around the lid, and does not get forced through the airlock. To see what is really happening, take a specific gravity reading.

With warming up, the yeast will not start off as though it was put into a warm wash to start with- it will be a little slower. Also, much of your dissolved oxygen had likely dissipated, which will not allow for as much dividing of the yeast. Less yeast will mean slower fermentation.

Certainly, a very high SG, with a pot. alc. of more than 18-20%, will definitely slow the yeast down.
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#17 Posted : Tuesday, March 13, 2007 4:38:09 AM(UTC)
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Ok, check the yeast in the morning after stirring some air into the wash and warming it up last night, it seems to be going pretty good. Nothing like a Turbo24, but very close to what I usually get using a turbo48.

Looks like with the high OG the yeast needed a little kick in the behind with some warmer temps.

I"m going to let it run for today, and when I get back home I"ll try and cool it down to the recommended temp and see if it halts the fermentation or not.

Thanks for all the help.

Waiting to hear your experience John!
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#18 Posted : Tuesday, March 13, 2007 8:46:28 AM(UTC)
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Alex, Funny you should ask. I have 15# dark brown sugar and a qt. of table grade molasses topped to 26L mark. Its at 32°C and reading 1.12, the best I can read the blooming thing with my eyesight, uncorrected. Its sitting in cool water. I will retest the OG and correct it when it gets to pitching temp. I'm going to pitch at 25° and maintain it at 24° at least for the first day or 2. I filled the fermenter with the shower in the bath, so it won't be an O2 problem if I have one. If it goes good I'll add a bit more molasses later.
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#19 Posted : Tuesday, March 13, 2007 9:25:34 AM(UTC)
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john,are you going to make that wheat germ recipe? i was thinking about it,but i might substitute some light D.M.E.for part of the sugar.ive got 4lbs of it sitting around.
Any thoughts?
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#20 Posted : Tuesday, March 13, 2007 9:59:39 AM(UTC)
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Wineo, You're a mind reader today, or you're close looking on.

I did the boil for an hour and half. Its sitting in a sink full of cold water right now to cool off enough to transfer and top off.

I think the DME would enhance it. I used 2 jars, 24 oz instead of the 16.

Thinking of useing either ec 1118 or K1V 1116. Any suggestions?
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