Quantcast

Fermaid Additions

Wine Making Talk

Help Support Wine Making Talk:

Rob_S

Member
Joined
Jul 12, 2013
Messages
38
Reaction score
3
Would like to compare notes. How much Fermaid do you usually add at beginning of fermentation and how much at 1/3 sugar depletion?

Sometimes I get H2S issues with the rate on the bag of 0.3 g/Litre. For example when doing 70 litres of must, would come to 21 g of Fermaid, and would add about 11 g at beginning and the other 10 g at 1/3 sugar depletion. At that rate I'm getting H2S issues, and that's even with some added DAP. So perhaps I'm not adding enough and thinking maybe I should add 0.3g/Litre at beginning and again another 0.3g/L at 1/3 sugar depletion, thereby doubling the amount of Fermaid I've been adding?

Rob
 

cmason1957

CRS Sufferer
WMT Supporter
Joined
Aug 5, 2011
Messages
4,057
Reaction score
3,268
Location
O'Fallon, MO - Just NorthWest of St. Louis, MO
I generally don't add any at the beginning of fermentation, but wait for a day or two and then add half of what I calculated and the other half at the 1/3 sugar depletion point. Occasionally I get a whiff of H2S issues and add another 1/4 amount. It seems to work for me.
 

Rob_S

Member
Joined
Jul 12, 2013
Messages
38
Reaction score
3
I generally don't add any at the beginning of fermentation, but wait for a day or two and then add half of what I calculated and the other half at the 1/3 sugar depletion point. Occasionally I get a whiff of H2S issues and add another 1/4 amount. It seems to work for me.
I usually add half at the beginning of the Cap formation. How do you calculate how much to add?
 

ceeaton

Fifth year
Joined
Feb 15, 2015
Messages
5,061
Reaction score
5,114
Location
Southern PA
Rob, what yeast are you using? I usually go to Lallemand's site ( http://www.lallemandwine.com/north-america/products/catalogue/ ) and see how heavy of a nitrogen requirement the yeast has. Many times if it isn't a heavy feeder I add the first 1/2 once fermentation starts up in earnest and wait to see if I get any off smells before adding the balance, I usually use Fermaid O since it can be added later in the process and still be used up.

I also use Go Ferm to rehydrate with in the beginning, whether it's a kit or all grapes, but only add nutrients to all grape batches (unless there are strong H2S odors with the kit ferment).

For Fermaid O (1.5grams x X gallons estimated must / 2 = 1/2 addition). Ex. 110 lbs grapes is usually about 7.5 gallons must so (1.5 x 7.5) / 2 = 5.625 grams (I put in 6 grams).
 
Last edited:

Rob_S

Member
Joined
Jul 12, 2013
Messages
38
Reaction score
3
Rob, what yeast are you using? I usually go to Lallemand's site ( http://www.lallemandwine.com/north-america/products/catalogue/ ) and see how heavy of a nitrogen requirement the yeast has. Many times if it isn't a heavy feeder I add the first 1/2 once fermentation starts up in earnest and wait to see if I get any off smells before adding the balance, I usually use Fermaid O since it can be added later in the process and still be used up.

I also use Go Ferm to rehydrate with in the beginning, whether it's a kit or all grapes, but only add nutrients to all grape batches (unless there are strong H2S odors with the kit ferment).

For Fermaid O (1.5grams x X gallons estimated must / 2 = 1/2 addition). Ex. 110 lbs grapes is usually about 7.5 gallons must so (1.5 x 7.5) / 2 = 5.625 grams (I put in 6 grams).
Thanks Craig, I've been seeing more H2S issues with yeasts such as CSM and RC212 and they are high N demand yeasts. The latest must I've used is from Niagara Falls, a Cabernet Sauvignon, and the grower has told me the grapes usually are on the low side for YAN. The package I have is labelled just 'Fermaid', I'm pretty sure it is Fermaid K, have been adding the other half at 1/3 depletion and beyond if seeing H2S even though it has a slight bit of DAP compared to Fermaid O that would not have any DAP at all. What happens is I'm usually at work when the issues start so can't intervene right away by adding a bit more organic nutrients. I just found an interesting and excellent 'sticky' article on this Web forum by Deezil titled 'Yeast Nutrients', under the section 'Additives & Wine Making Science'. This should prove useful to get an educated estimate on the nutrient additions. Not a simple question, and thanks for stepping up and from what I can see you seem to be adding about twice what I have been using. This will help convince me I should be adding more nutrients. :h

Rob
 

ceeaton

Fifth year
Joined
Feb 15, 2015
Messages
5,061
Reaction score
5,114
Location
Southern PA
I just found an interesting and excellent 'sticky' article on this Web forum by Deezil titled 'Yeast Nutrients', under the section 'Additives & Wine Making Science'. This should prove useful to get an educated estimate on the nutrient additions. Not a simple question, and thanks for stepping up and from what I can see you seem to be adding about twice what I have been using. This will help convince me I should be adding more nutrients. :h

Rob
I was looking for that article and was going to suggest it, it might be nice to post a link to it here to complete the circle. And since I don't do the estimation of the nutrients in the must like he has been doing, I've been following the instructions on MoreWinemaking.com's site. My results have been good so far (I've used RC 212 a few times in the past and that is where I was having my issues) and I haven't noticed any bacterial issues from left over nutrients in my finished wines, though most of them are at most 18 months old.
 

Rob_S

Member
Joined
Jul 12, 2013
Messages
38
Reaction score
3
I was looking for that article and was going to suggest it, it might be nice to post a link to it here to complete the circle. And since I don't do the estimation of the nutrients in the must like he has been doing, I've been following the instructions on MoreWinemaking.com's site. My results have been good so far (I've used RC 212 a few times in the past and that is where I was having my issues) and I haven't noticed any bacterial issues from left over nutrients in my finished wines, though most of them are at most 18 months old.
Great idea, here's the link: http://www.winemakingtalk.com/forum/showthread.php?t=39655

CSM seems even worst for the YAN requirements, although I like it for Hybrid grapes. MoreWine has helped me out a lot too, good basic principles.

Rob
 

NorCal

Super Moderator
Super Moderator
Joined
Apr 17, 2014
Messages
3,184
Reaction score
3,315
Location
Sierra Foothills, Nor Cal
I've had varying levels of h2s. Always Ferm K to the instructions. Never fun to deal with. @4Score and I switched to Renaissance yeast this year and not even a hint of h2s on any of our ferments. I don't see using any other yeast going forward.

From their web site:
Renaissance Yeast Inc. is a leader in the development and commercialization of hydrogen sulfide-preventing wine yeasts for winemakers worldwide. Our highly experienced research staff is dedicated to developing yeasts that address and solve some of the industry’s most important challenges.
 
Last edited:

Stressbaby

Just a Member
Joined
Aug 19, 2012
Messages
2,078
Reaction score
830
Sorry to threadjack here, but @Norcal, what is your source for the Renaissance Yeast? I might like to try it out, but a quick search of my usual online suppliers doesn't get any hits.
 

NorCal

Super Moderator
Super Moderator
Joined
Apr 17, 2014
Messages
3,184
Reaction score
3,315
Location
Sierra Foothills, Nor Cal
Sorry to threadjack here, but @Norcal, what is your source for the Renaissance Yeast? I might like to try it out, but a quick search of my usual online suppliers doesn't get any hits.
It is not widely distributed. Check the distributor listed on their website.
 

stickman

Veteran Winemaker
Joined
Jun 16, 2014
Messages
1,638
Reaction score
1,528
I found this information on Fermaid products. I noticed that they called DAP Diammonium Sulphate, which should be Diammonium Phosphate.

Fermaid Addition Table.png
 
Last edited:

Latest posts

Top