Lallemand Fermaid AT – Mead & Spirit Wash Yeast Nutrient
Lallemand Fermaid AT 100g is a complex yeast nutrient for mead, sugar spirit washes, wine, cider and other alcoholic fermentations, formulated to support healthy yeast growth and help reduce the risk of sluggish or stuck fermentation.
Fermaid AT supplies a balanced combination of organic nitrogen from specific inactivated yeast, inorganic nitrogen from DAP and thiamine, providing yeast with important nutrition during alcoholic fermentation.
It's particularly useful for mead and sugar-based spirit washes, where the fermentable sugars themselves provide little of the nitrogen and nutrients yeast requires for healthy growth and reliable fermentation.
Why You'll Love It
- Excellent yeast nutrient for mead making
- Ideal for sugar and neutral spirit washes
- Lallemand complex fermentation nutrient
- Contains both organic and inorganic nitrogen sources
- Contains DAP as part of the nutrient blend
- Contains specific inactivated yeast
- Supplemented with thiamine
- Helps support healthy yeast growth
- Helps reduce the risk of sluggish and stuck fermentations
- Particularly useful for nutrient-poor and low-YAN fermentations
- Suitable for wine and cider
- Suitable for staged nutrient additions
- Convenient 100g pack
Fermaid AT for Mead Making
Mead fermentation can be particularly demanding on yeast nutrition because honey provides plenty of fermentable sugar but relatively little yeast-assimilable nitrogen compared with many fruit-based musts.
Using an appropriate yeast nutrient helps provide the yeast with additional nutrition during fermentation.
Fermaid AT provides both organic and inorganic nitrogen sources, making it a useful nutrient option when producing traditional mead, melomel and other honey-based fermentations.
For mead makers using a staggered nutrient addition schedule, the total nutrient requirement can be divided into multiple additions during the early stages of fermentation rather than adding everything at once.
The exact nutrient requirement will depend on the original gravity, yeast strain, batch size, desired alcohol level and nutrient schedule.
Fermaid AT for Sugar Spirit Washes
Fermaid AT is an excellent nutrient option for sugar spirit washes and neutral alcohol fermentations, where yeast nutrition can be particularly important.
Unlike grain or fruit-based fermentations, a simple sugar wash provides fermentable carbohydrate but very little natural yeast nutrition. Without adequate nutrition, yeast can become stressed, potentially contributing to slow fermentation, stuck fermentation and unwanted fermentation character.
Fermaid AT provides a combination of:
- Organic nitrogen from specific inactivated yeast
- Inorganic nitrogen from DAP
- Thiamine to assist yeast nutrition
This makes Fermaid AT a more complex nutrient than using straight DAP alone.
Fermaid AT can be used in suitable:
- Sugar washes
- Neutral spirit washes
- White spirit washes
- Rum-style washes
- High-ABV sugar fermentations
- Hard seltzer bases
- Other nutrient-poor alcoholic fermentations
Helps Prevent Sluggish & Stuck Fermentations
Fermaid AT is designed to help reduce the occurrence of sluggish and stuck alcoholic fermentations, particularly where available nitrogen is limited.
Providing appropriate yeast nutrition helps support yeast population development and fermentation performance throughout alcoholic fermentation.
This can be particularly important when producing mead, sugar washes, higher-alcohol fermentations, wine and other nutrient-demanding ferments.
What's in Fermaid AT?
Fermaid AT isn't simply DAP.
It is a complex yeast nutrient containing:
- Inorganic nitrogen from DAP
- Organic nitrogen from specific inactivated yeast
- Thiamine
This combination provides yeast with a broader range of nutrition than using straight DAP alone.
Fermaid AT & YAN
YAN – Yeast Assimilable Nitrogen – is the nitrogen available to yeast during fermentation.
Fermaid AT is particularly useful in low-YAN and nutrient-poor fermentations.
At a dosage of 30g/hL (30g per 100L), Fermaid AT provides approximately 36mg/L of actual YAN.
The appropriate nutrient requirement will vary depending on the fermentation, so advanced mead, wine and spirit-wash nutrient schedules should consider the starting gravity, yeast requirements, target alcohol level and available nutrients.
Fermaid AT vs DAP
Although Fermaid AT contains DAP, it is not the same product as straight diammonium phosphate.
Straight DAP primarily provides an inorganic nitrogen source.
Fermaid AT combines this with organic nitrogen from specific inactivated yeast and thiamine, providing a more complex nutrient blend.
If a recipe specifies a particular nutrient schedule, follow the quantities and nutrient type specified by that recipe rather than automatically substituting Fermaid AT gram-for-gram for pure DAP.
Fermaid AT vs Fermaid O
Both products are Lallemand fermentation nutrients, but they provide different forms of nutrition.
Fermaid AT contains a combination of inorganic and organic nitrogen sources, including DAP.
Fermaid O supplies organic nutrition without DAP.
The appropriate choice depends on your fermentation, available nitrogen, yeast strain and nutrient schedule.
How to Use Fermaid AT
Suspend Fermaid AT in approximately 10 times its weight in water or must before adding it to the fermentation.
For example:
10g Fermaid AT → approximately 100ml water or must
Mix thoroughly until well dispersed and free of lumps, then add to the fermentation.
For mead and other fermentations using a staggered nutrient addition schedule, Fermaid AT may be divided into multiple additions during the early stages of fermentation according to the recipe or nutrient schedule being followed.
Recommended Dosage
Lallemand's recommended dosage for Fermaid AT is:
30–40g/hL
Equivalent to:
30–40g per 100 litres
or approximately:
7–9g per 23 litres
Nutrient requirements can vary considerably, particularly with mead and sugar spirit washes, so dosage should be matched to the fermentation, yeast strain, starting gravity and nutrient schedule where possible.
Ideal For
- Traditional mead
- Melomel and fruit mead
- High-gravity mead
- Sugar spirit washes
- Neutral spirit washes
- White spirit washes
- Rum-style washes
- High-ABV sugar fermentations
- Hard seltzer bases
- Wine
- Cider
- Fruit wine
- Low-YAN fermentations
- Nutrient-poor alcoholic fermentations
- Staggered nutrient addition schedules
Features
- Lallemand Fermaid AT
- Complex yeast nutrient
- Excellent for mead making
- Suitable for sugar and spirit washes
- Contains organic and inorganic nitrogen sources
- Contains DAP
- Contains specific inactivated yeast
- Contains thiamine
- Supports healthy yeast fermentation
- Helps reduce sluggish and stuck fermentation risk
- Suitable for low-YAN and nutrient-poor fermentations
- 100g pack
Specifications
Brand: Lallemand
Product: Fermaid AT
Product Type: Complex Yeast Nutrient
Pack Size: 100g
Nitrogen Sources: Organic & Inorganic
Contains DAP: Yes
Contains Inactivated Yeast: Yes
Contains Thiamine: Yes
Recommended Dosage: 30–40g/hL
Equivalent Dosage: 30–40g per 100L
YAN Contribution at 30g/hL: Approx. 36mg/L actual YAN
Application: During alcoholic fermentation
Suitable For: Mead, Sugar Spirit Washes, Wine, Cider & other suitable alcoholic fermentations
Frequently Asked Questions
Is Fermaid AT good for mead?
Yes. Fermaid AT provides a combination of organic and inorganic nitrogen sources plus thiamine, making it useful for supporting yeast nutrition during mead fermentation.
What does Fermaid AT do in mead?
Fermaid AT supplies additional yeast nutrition during fermentation. This helps support yeast growth and fermentation performance and can help reduce the risk of sluggish or stuck fermentation.
Can I use Fermaid AT in a sugar wash?
Yes. Fermaid AT can be used as a yeast nutrient for sugar-based spirit washes. Sugar washes can be very low in natural yeast nutrition, making appropriate nutrient additions particularly important for healthy fermentation.
Is Fermaid AT suitable for neutral spirit washes?
Yes. Fermaid AT can be used in neutral and white spirit washes where additional yeast nutrition is required.
Does Fermaid AT contain DAP?
Yes. Fermaid AT contains DAP as an inorganic nitrogen source, along with organic nitrogen from specific inactivated yeast and thiamine.
Is Fermaid AT the same as DAP?
No. Fermaid AT contains DAP, but it is a complex yeast nutrient rather than pure DAP. It also contains specific inactivated yeast and thiamine.
Is Fermaid AT better than DAP for a sugar wash?
Fermaid AT provides a broader nutrient profile than straight DAP. DAP primarily provides inorganic nitrogen, while Fermaid AT combines inorganic nitrogen with organic nitrogen and thiamine.
Which nutrient and dosage is appropriate depends on the particular fermentation and yeast being used.
Is Fermaid AT the same as Fermaid K?
No. They are different formulations. If a recipe specifically calls for Fermaid K, don't automatically substitute Fermaid AT gram-for-gram without adjusting the nutrient schedule.
What is the difference between Fermaid AT and Fermaid O?
Fermaid AT supplies both inorganic and organic nitrogen and contains DAP, while Fermaid O provides organic nutrition without DAP.
How much Fermaid AT should I use?
The recommended dosage is approximately 30–40g per 100 litres. Mead and spirit-wash nutrient requirements can vary, so follow an appropriate nutrient schedule for your fermentation where possible.
When should I add Fermaid AT?
Fermaid AT is added during alcoholic fermentation. For mead and other suitable fermentations, it can form part of a staggered nutrient schedule during the early stages of fermentation.
Can I use Fermaid AT with Go-Ferm?
Yes. They perform different jobs. Go-Ferm is used during active dry yeast rehydration, while Fermaid AT provides yeast nutrition during alcoholic fermentation.
Why Buy from Border Brewing Supplies?
Buy Lallemand Fermaid AT 100g Mead & Spirit Wash Yeast Nutrient from Border Brewing Supplies for healthy, reliable mead, sugar wash, wine and cider fermentations.
- Convenient 100g pack
- Ideal for mead makers and home distillers
- Australia-wide shipping
- Click & Collect available
- Local pickup in Tweed Heads South
- Local service across the Gold Coast, Tweed Heads and Northern NSW
- Range of Lallemand fermentation nutrients and yeasts
- Mead making and spirit fermentation supplies
- Specialist home fermentation advice
