Found this thread in search, hoping to dust it off for some help
I just ordered the new NB Ferocious IPA, and it is coming with 2 packs of S-04, est. 1.065OG on the extract kit.
Safeale page shows 6bn cells / gram. Which would be about 69bn per 11.5g pkg, at 2pkgs I would get 138bn cells...assuming all cells at packaging are viable? When I plug numbers into yeastcalculator.com it shows me needing 226bn for a 5-gal, 1.065 wort. By my math, it seems I'd be under-pitching if I just re-hydrated the dry yeast, yeah? So, I feel I would do better to create a yeast starter in this case?
I know there are debates and recommendations not to use dry yeast in a starter. I have been having good luck doing it over my last couple of beers. I actually enjoy it (it makes me feel "science-y") And I feel like I'm improving my odds of good yeast and good fermentation.
If I may re-ask the original posters question. Can you (should you?) use two packs of yeast for a 2L starter? Or is the ratio off?
I've seen instructions for a two-stage starter where you decant the wort and add more wort...but, doesn't add more yeast. Maybe the 1 pack of S-04 and a two-stage starter would get me to my 226bn cell pitch?
I know I'm likely overthinking this, and I should relax and have a homebrew But, I've had trouble with IPAs...and this is my redemption brew!
Appreciate the help and advice.