Go Ferm, 2 oz, Use 2 tsp. of Go-Ferm in 1 cup of water at 104 F to rehydrate 8g of dry yeast. Then Slowly cool with small must additions for at least 15 minutes to reach pitching temperature. Go-ferm is a yeast rehydration nutrient .Go-ferm is affective for helping the yeast survive. Infusing yeast with these essential nutrients arms them against ethanol toxicity and optimizes nutrient availability.