Fermaid O - 12g-Yeast Nutrient-Bitter & Esters

Fermaid O - 12g

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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

Red Star

Premier Cuvee

50-104 (10-40)

17

Medium

Neutral

Red Star

Premier Blanc

50-95 (10-35)

18

Low

Neutral

Red Star

Cote de Blancs

64-86 (18-30)

16

Medium

Enhances Varietal Character

Red Star

Premier Rouge

64-86 (18-30)

15

Medium

Enhances Varietal Character

Red Star

Premier Classique

54-95 (12-35)

15

Low

Neutral

Lalvin

EC-1118

50-86 (10-30)

18

Low

Neutral

Lalvin

K1V-1116

50-95 (10-35)

18

Low

Increased esters (Fruity)

Lalvin

71B

59-86 (15-30)

15

Low

Increased esters (Fruity)

Lalvin

DV10

50-95 (10-35)

18

Low

Neutral

Lalvin

D47

59-82 (15-28)

14

Low

Enhances Varietal Character

Lalvin

RC-212

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