Fermaid® O is certified organic by OMRI. It is an autolyzed yeast nutrient with a high content of organic nitrogen (amino acids). It is formulated without DAP. It is best to add Fermaid O in two doses. Add half the dose at the end of lag phase (at the onset of fermentation) and the other half between 1/4 and 1/3 sugar depletion.
Fermaid O (TOSNA) Nutrient Protocol
Mead Musts are very nitrogen deficient. Adding nitrogen to mead is essential for fermentation to complete and to not produce H2S (Hydrogen Sulfide) , which smells like rotten eggs. Yeasts have different levels of nutrient requirements, so you should tailor the amount of nutrients you add for the yeast strain you are using.
To avoid mead eruption accidents, degas Must and dissolve yeast nutrient doses in 1 cup Must prior to adding to the fermenter.
|
Yeast N2 Requirements |
Yeast Pitch (YP) + 24h |
YP + 48h |
YP + 72h |
YP + 96h |
|
Low |
0.7g |
0.7g |
0.7g |
0.6g |
|
Medium |
0.8g |
0.8g |
0.8g |
0.9g |
|
High |
1.2g |
1.2g |
1.2g |
1g |
|
Manufacturer |
Yeast Strain |
Temperature Range °F (°C) |
Alcohol Tolerance (%) |
Relative Nitrogen Requirements |
Notes |
|
50-104 (10-40) |
17 |
Medium |
Neutral |
||
|
50-95 (10-35) |
18 |
Low |
Neutral |
||
|
64-86 (18-30) |
16 |
Medium |
Enhances Varietal Character |
||
|
64-86 (18-30) |
15 |
Medium |
Enhances Varietal Character |
||
|
54-95 (12-35) |
15 |
Low |
Neutral |
||
|
50-86 (10-30) |
18 |
Low |
Neutral |
||
|
50-95 (10-35) |
18 |
Low |
Increased esters (Fruity) |
||
|
59-86 (15-30) |
15 |
Low |
Increased esters (Fruity) |
||
|
50-95 (10-35) |
18 |
Low |
Neutral |
||
|
59-82 (15-28) |
14 |
Low |
Enhances Varietal Character |
||
|
68-86 (20-30) |
16 |
High |
Enhances Varietal Character |
Storage: Dated expiration. Store at 18°C(65°F). Once opened, keep tightly sealed and dry.
Size: 12 Grams