So i'm in the process of planning a Russian Imperial Stout and was trying to figure out how much yeast to pitch. This is my first go round with making a starter and all that jazz so please bear with me.
The OG is around 1.080 which according to mr. malty says I'm going to need ~270 billion cells. So I'm thinking about using a 2L starter for one smack pack which will give me 200 billion cells. First question, would just pitching this starter by itself be enough or will that put too much stress on the yeast?
All I have is a 2L flask so would I not be able to step it up any bigger (I think?). So I was leaning towards buying an extra smack pack and throwing that in there along with my starter which would give me 300 billion cells, definitely adequate. Which leads me to another question, could I just throw both smack packs in the original starter, leave it for awhile and call it good? I'd like to not have to buy an extra pack if possible but will obviously do so if it means a better final product.
Onoce again please excuse my ignorance but I'm still learning about starters and stepping them up.