1 gram of Fermaid O per gallon of mead
Fermaid O is a yeast nutrient used in mead production to ensure healthy fermentation. The standard dosage is 1 gram per gallon of must (unfermented honey and water mixture). This nutrient provides essential compounds like nitrogen, sterols, and vitamins that yeast need to thrive and complete fermentation efficiently.
Comparison of yeast nutrient options per gallon
| Nutrient | Dosage per gallon | Best for |
|---|---|---|
| Fermaid O | 1 gram | Organic nutrient, no inorganic nitrogen |
| Fermaid K | 1 gram | Balanced nutrient with DAP |
| DAP (Diammonium Phosphate) | 0.5-1 gram | High nitrogen content |
When to add Fermaid O
Add half the total amount (0.5g per gallon) at the start of fermentation when pitching yeast. Add the remaining half 24-48 hours later to support yeast through the most active fermentation phase. This staggered approach prevents yeast stress and ensures complete nutrient availability throughout the fermentation process.
Measuring without a scale
If you don't have a precise scale, 1 gram of Fermaid O is approximately 1/4 teaspoon. For a 5-gallon batch, use 5 grams total (about 1.25 teaspoons), split between the two additions. While measuring by volume isn't as accurate as weighing, it provides a workable approximation for home mead makers.