Originally Posted by Phunhog
I am making my first starter for a 10 gallon batch. Mr. Malty recommends a 1.7L starter for 11 gal. of 1.051 wort. I am using a stirplate. Can I just make a 2L starter, dump in the vial, and call it good? Do I need to step it up from 1L? Thanks. Al
I think you need to check the pitching rate calculator again... 10 gallons of 1051 need 357 billion cells. You will need a little bigger starter than that... Unless you are only talking for the amount to pitch into half the batch (one carboy). If not, you are better off doing 2 vials into a 3.7 liter (about one gallon) starter.
As far as stepping up, I think that is unnecessary. The yeast are not going to be overwhelmed by 1040 wort. There may be a lot of replication, and therefore your starter will not have the best taste, but you're not making the starter for taste, only to grow yeast. As long as you decant, you are fine.
I plan to make a 5.5 gallon batch of 1.105. I think I need over 400 billion cells, so I made a 3 gallon batch of 1040 English bitter to use the yeast cake, rather than buy several vials or waste starters. I pitched one vial. Do you think one vial isn't enough to ferment that? Why wouldn't one vial be enough to ferment 2500 mL of starter?