Yellow label yeast behaving strangely

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Yellow label yeast behaving strangely

Post by Sarge410884 »

I start a mash with 7 gallons water, 10 lbs brown rice, 4 lbs jasmine rice and 5 lbs of oats. PH started at 4.9. This started 11/17, maintained temp at 85 degrees. Under air lock, stired 2 times per day. Now ph has gone to 3.5, air lock still active, rice hulls are floating to the surface. Has acidic taste but still pretty active. What's going on here, i have used this many times, this is a first, pleseshare your thoughts.
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Re: Yellow label yeast behaving strangely

Post by Stonecutter »

How does it taste?
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Re: Yellow label yeast behaving strangely

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Acidic, and starch test shows no more starch
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Re: Yellow label yeast behaving strangely

Post by Stonecutter »

I’d say she’s ready. You may have a stall. I’m not familiar with Angel at all. Normally I’d say Stick a hydrometer in there if it reads 1.00 or somewhere very close you’re good to go friend.
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Re: Yellow label yeast behaving strangely

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With angel you don't have a starting gravity because there is no sugar. The enzmes do all the conversion and make alcohol out of the starch
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Re: Yellow label yeast behaving strangely

Post by Stonecutter »

I figured as much.
I edited my post to reflect the fact that I know nothing about that strain of yeast. If it’s Not showing starch I’d run it
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Re: Yellow label yeast behaving strangely

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Problem is it is still active bubbling away
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Re: Yellow label yeast behaving strangely

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Yeast is yeast and although I’ve never used that strain of yeast before I’d still say run it.
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Re: Yellow label yeast behaving strangely

Post by renedox »

Might have stirred it a bit too much, you only really need to stir once or twice in the first few days then let it do its thing for the next couple of weeks.

Is there anything leftover apart from mush when you stir it? When I do corn or [instant] oats, it all eventually gone except corn skin and oat hulls. There shouldn't be anything left that you can easily identify as "yip, that still has some starch in it".
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Re: Yellow label yeast behaving strangely

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Ok, it has always finished in a few days so this is a new experience, like i said, it is still active, thanks
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Re: Yellow label yeast behaving strangely

Post by renedox »

For me, Yellow Label is really active in the first few days and then it slowly ticks away for a couple weeks while it cleans up the rest of the wash.
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Re: Yellow label yeast behaving strangely

Post by Sporacle »

As Stoney said chuck a Hydrometer in it, on a side note I just racked a UJSSM that has been finished for two and a bit weeks and it was still bubbling (very infrequent and large)
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Re: Yellow label yeast behaving strangely

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Stonecutter wrote: Tue Nov 29, 2022 7:28 pm Yeast is yeast and although I’ve never used that strain of yeast before I’d still say run it.
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SG might show some change in the first few days, but then it should stabilize. I record it to learn from it.

I find that change in the refractive index is the best indicator of activity. Any type of refractometer a distiller is likely to own works for this.
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Re: Yellow label yeast behaving strangely

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I'll give that a try, thanks
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Re: Yellow label yeast behaving strangely

Post by Metalking00 »

Hydrometers dont really work and a starch test doesnt always show reliable results with angel yeast either. You can take a little of the goop on a plate and smush it up and then do the starch test to see if theres still goodness left that the fungus hasnt had time to convert yet.

In my experience, yellow label usually takes about 2-3 weeks to finish. How finely your grains are milled makes a difference too. Usually it bubbles like crazy for the first 2 or 3 days, then slows down and chugs along. If its still bubbling, leave it alone and let it do its thing.
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Re: Yellow label yeast behaving strangely

Post by NZChris »

I find that the instructions are very good, (but poorly translated into English).

Controlled to the recommended fermenting temperatures, my ferments have always finished within Angel's suggested times and with negative starch tests.
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Re: Yellow label yeast behaving strangely

Post by EricTheRed »

NZChris wrote: Tue Nov 29, 2022 11:42 pm I find that the instructions are very good, (but poorly translated into English).

Controlled to the recommended fermenting temperatures, my ferments have always finished within Angel's suggested times and with negative starch tests.
Not trying to hi-jack thread - what dosage do you use Chris? Been reading, and their doc is a tad confusing. Looks like 2 grams per kilo of grain?
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Re: Yellow label yeast behaving strangely

Post by NZChris »

The middle of whatever Angel recommended on the bag, website, or PDF. I always aim for the middle.
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Re: Yellow label yeast behaving strangely

Post by Saltbush Bill »

If its still bubbling at the airlock leave it be......its not finished.
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Re: Yellow label yeast behaving strangely

Post by Demy »

I've often had butyric acid buildup with this yeast mix, it's a good tool even if I prefer a traditional mash. Council as said by the others to use the hydrometer and if ready to run it.
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Re: Yellow label yeast behaving strangely

Post by Sarge410884 »

Great info, thanks
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Re: Yellow label yeast behaving strangely

Post by rubberduck71 »

My YLAY baches typically take 7-10 days. When it's done, it's static/calm. I do shake/rotate/spin my fermenters (vs opening lid & stirring) especially in 1st three days to knock down the krausen & grain floating at top.

I then invert some sugar & pour back on top of "spent" grain to make a sugarhead.
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Re: Yellow label yeast behaving strangely

Post by Sarge410884 »

Hey good idea
Thanks for the reply
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Re: Yellow label yeast behaving strangely

Post by NZChris »

I've also done it the other way around, using it to make base spirit for gin from the starch in spent corn from making UJSSM.
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Re: Yellow label yeast behaving strangely

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Yet another great idea, its nice to hear other are using yellow label.
Thanks my friend,
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Re: Yellow label yeast behaving strangely

Post by 6 Row Joe »

Speaking of UJSSM, have you used Yellow label in it? If you have, did you notice any difference in the taste or proof?
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Re: Yellow label yeast behaving strangely

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I have never made that either way, but it's on my list
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Re: Yellow label yeast behaving strangely

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6 Row Joe wrote: Fri Dec 02, 2022 11:45 am Speaking of UJSSM, have you used Yellow label in it? If you have, did you notice any difference in the taste or proof?
It can’t be done. If you use it, it can’t be UJSSM.

This product, used correctly, will convert and ferment all of the starch in the corn so will dilute the flavor.
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Re: Yellow label yeast behaving strangely

Post by 6 Row Joe »

NZChris wrote: Sat Dec 03, 2022 12:03 am
6 Row Joe wrote: Fri Dec 02, 2022 11:45 am Speaking of UJSSM, have you used Yellow label in it? If you have, did you notice any difference in the taste or proof?
It can’t be done. If you use it, it can’t be UJSSM.

This product, used correctly, will convert and ferment all of the starch in the corn so will dilute the flavor.
I was wondering about that. It should work with a single batch I would imagine.
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Re: Yellow label yeast behaving strangely

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6 Row Joe wrote: Sat Dec 03, 2022 6:07 am I was wondering about that. It should work with a single batch I would imagine.
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