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-   -   Can I make a 2 L starter with two 1 L flasks and one stirplate? (http://www.homebrewtalk.com/f163/can-i-make-2-l-starter-two-1-l-flasks-one-stirplate-174119/)

Reelale 04-20-2010 02:22 PM

Can I make a 2 L starter with two 1 L flasks and one stirplate?
 
I want to try Jamil's Tripel recipe in the latest BYO. OG is 1.081. This will be the biggest beer I've attempted. I have a couple of jars of washed Wyeast Belgian Abbey II 1762 from Oct 2009. Mr. Malty says I need a 2.34 L starter for this OG. My problem is I only have two 1L flasks and 1 stirplate. Is it possible to step-up to the recommended volume with the equipment I have? Is two 1L starters equivalent to one 2L starter? I've read through the threads about starters using washed yeast, and I'm more confused now than when I started. I would assume that washed yeast would have about the same cell count as a Wyeast Smack Pak, given the same volume. Does the initial amount of yeast pitched into a starter matter, or does it just take longer to grow with smaller amounts? Help and/or recommendations are greatly appreciated.

smizak 04-20-2010 02:57 PM

I just use a big (over a gallon) jug for my starters. I've been told by a pretty accomplished brewer who works in a microbiology lab that a yeast starter with a stirplate is completely defeating the purpose if there isn't at least half the volume of air as wort in the stirred vessel.

Reelale 04-20-2010 03:07 PM

I'm assuming that is for O2 absorption. I've had real good luck with 1L starters in 1L flasks just lightly covering the flask with foil.

smizak 04-20-2010 03:24 PM

I've had good results too with that method, it's still a starter. But I took his advice and on my last batch, 1.5L starter in a gallon jug, it was amazing the difference. I had a four inch krausen even with the stir plate running. That has never happened to me, and I'm assuming it because of the much greater volume of gas allowing for a better exchange. The yeast just took off.

Reelale 04-20-2010 03:28 PM

Did you step it up or start with 1.5L?

smizak 04-20-2010 03:36 PM

Started it at 1.5L.

Gremlyn 04-20-2010 03:56 PM

Well, you can't do two 1L at the same time... I'm sure you realise that, but I don't see an issue doing a 1L starter, putting that in the fridge and then doing another.

I would strongly recommend getting a larger flask though, 3L would be a good size.

Reelale 04-20-2010 04:26 PM

Yeah, that's what I was thinking. Just combining them when pitching.


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