Brewed my second batch of homebrew two nights ago -- a 5 gallon American Amber Ale extract kit. OG was 1.058. I put in one smack pack of Wyeast 1056 directly (no starter). Checked fermentation at 24 hours and there was significant krausen and blowoff activity. Felt that things were going really well.
Today, upon reading various threads in the Fermentation & Yeast forum, I am beginning to fear I did not provide enough yeast! Using the mrmalty calculator I found today http://www.mrmalty.com/calc/calc.html it seems that I should have used two packs of 1056. mrmalty calls for 200 billion cells whereas my single Wyeast 1056 pack has 100 billion.
Question: did I under pitch? Should I pour in one more pack tonight, 48 hours after original yeast pitching, or is it too late to do such a thing?
Thank you for your feedback!