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Excellent product that I have used for years. Never had a stuck fermentation while using this nutrient as recommended. Not just in homebrews, but in mead also. I e-mailed the Wyeast Company to check because I had no wine nutrients on hand and they felt this product would more than cover my nutrient needs for my Cyser recipe. Using 3 staggered additions of 1/4 tsp. along with I/2 tsp. of DAP at onset of fermentation, at 24 and then at 72 hours, it worked great.
Yeast nutrients, along with oxygenation and a yeast starter, has greatly improved my fermentation and beer. This is highly recommended.
I've been using this additive now for about 2 vials worth, never had a bad fermentation, they always go like rockets, I wouldn't think of brewing without it now.
Pros: Great stuff, used the recommended amount, and my starter took off much faster than usual, approx 3 hrs vs. the usual 8-12. Used it in a starter that was culturing from the dregs from 3 bottles of the last batch of cider. No activity in 24 hrs prior to adding the nutrients, vigorous activity in 5 hrs after adding! Cons: None
Pros: This stuff will make for an amazing fermentation. I use it in both the starters and in the boil. It really supercharges your yeast!! Visible fermentation in 12 hours, complete fermentation in 4 days is common.