Fermaid-K formula change?
#1
Posted 08 November 2011 - 08:29 AM
#2
Posted 08 November 2011 - 08:56 AM
Got it from 3B. I don't recall seeing that on their F-K previously, but it may be just a labeling change as you suggest. I'll dig into Lallemand's site later and see what they have to say.Where did you get it from? I've noticed that different homebrew stores put different suggestions on the packets.
#3
Posted 08 November 2011 - 12:00 PM
#4
Posted 08 November 2011 - 12:21 PM
- [*]Add 12.5 g/hL (1 lb/1000 gal) FERMAID® K at the end of the lag phase (beginning of alcoholic fermentation). and[*]Add 12.5 g/hL (1 lb/1000 gal) FERMAID® K around 1/3 sugar depletion.[/list]FERMAID O™ Fermaid O is the latest nutrient developed by our winemaking nutrient research team headed by Dr. Anne Ortiz-Julien. Fermaid O is a blend of inactivated yeast fractions rich in organic nitrogen. Fermaid O does not contain added ammonia salts (DAP) or micronutrients. The importance of organic nitrogen from yeasts is well known as a highly efficient nutrient source for wine yeasts, especially when compared to inorganic nitrogen from DAP. In addition, Fermaid O consistently produces lower levels of negative sulfur compounds, compared with DAP. With its high content of organic nitrogen, Fermaid O can help winemakers achieve steady fermentations, while limiting temperature peaks. When inorganic nitrogen (DAP) additions are NOT desired, the use of Go-Ferm® or NATSTEP™ and Fermaid O is recommended. With this combination, Go-Ferm or NATSTEP provides needed micronutrients during yeast rehydration, and Fermaid O (when added at 1/3 sugar depletion) supplies critical nutrients and survival factors to help the yeast avoid stressed conditions.
Edited by armagh, 08 November 2011 - 12:22 PM.
#5
Posted 08 November 2011 - 03:21 PM
I've searched and searched and never been able to find just how much DAP Fermaid K contributes so I'm guessing it's proprietary info they don't plan on sharing. Without the ability to test for YAN at home (something I currently have no interest in acquiring the equipment for) I don't think we'll get an answer. Fermaid O is available for home use. Its available on various HBS web sites. You can pretty much use O and K interchangeably. The big advantage to O is since it does not contain DAP so it's friendly to young yeast and you can add it at or even pre-inoculation. K can be a better choice for severely YAN deficient musts as yeast given the choice will choose inorganic nitrogen (DAP) over organic nitrogen. I've only used O in wine where there is some YAN (but really not much) available. From my limited usage I've found O to take off a little slower but still complete the fermentation all the same as K. The benefit for me was O fermented cooler and allowed for a longer contact time with thin skinned red grapes that I wanted to get more color out of. I could see a big benefit for white wines where temperature is more of an issue.And apparently they're still not saying how much DAP is in F-K. Wonder if they plan to release F-O for home use. I can think of some yeasts I would like to try with F-O. From Lallemand's website:
#6
Posted 08 November 2011 - 03:23 PM
#7
Posted 08 November 2011 - 06:18 PM
When I look at Fermaid-K closely I see scantily clad supermodels but that might just be me.If you look at Fermaid-K closely you can see the DAP crystals in there. And there isn't that much.
#8
Posted 09 November 2011 - 07:05 AM
None of my sources seem to have it. If you know of an outlet, please share.Fermaid O is available for home use. Its available on various HBS web sites. You can pretty much use O and K interchangeably. The big advantage to O is since it does not contain DAP so it's friendly to young yeast and you can add it at or even pre-inoculation. K can be a better choice for severely YAN deficient musts as yeast given the choice will choose inorganic nitrogen (DAP) over organic nitrogen.
#9
Posted 09 November 2011 - 09:20 AM
I've purchased it from M&M wine grape company . Use their search and type in 'Fermaid' and you'll get both K and O in the various quantities they sell it in. Everything from 10g to 10KGNone of my sources seem to have it. If you know of an outlet, please share.
#10
Posted 20 November 2011 - 03:23 AM
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