Author Topic: 2-Liter Volcano!  (Read 4262 times)

Offline philm63

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2-Liter Volcano!
« on: August 03, 2012, 05:00:20 AM »
Ok, so I'm new to yeast starters, but is it supposed to blow out of the flask like Mt. Vesuvius?!

I guess the real question here is does an eruption mean a significant reduction of anticipated cell count? How can I prevent this? I'd say I observed somewhere in the neighborhood of 2 or 3 Tablespoons of crud on the outside of my 2L flask and I have to assume this is a significant chunk of my yeast now sitting in a plate around the bottom of my flask instead of inside where it was safe.

It was my second step with a single WLP001 started in 1.5L, then decanted and placed in 1L - always using a 2L flask. Very active, but how can I prevent losses due to blowouts? Bigger flask? Smaller starters?
On Tap: Oatmeal Stout, IPA
Fermenting: Air
On Deck: Kolsch

Offline MaltLicker

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Re: 2-Liter Volcano!
« Reply #1 on: August 03, 2012, 07:37:53 AM »
I've done that too.  Are you using a stir plate?  If not, then I'd recommend smaller starters or a much bigger flask, b/c you're making a tiny beer in a confined space. 

One other advantage of a stir plate is the constant release of the CO2, preventing (usually) this over-blown problem. 

Offline philm63

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Re: 2-Liter Volcano!
« Reply #2 on: August 03, 2012, 08:44:24 AM »
Thanks ML.

My stir plate should be here any day now.

I'll assume it's safe to say what little is lost to foaming out of the flask is likely not enough to worry about - just messy!
On Tap: Oatmeal Stout, IPA
Fermenting: Air
On Deck: Kolsch

Offline piper55

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Re: 2-Liter Volcano!
« Reply #3 on: August 05, 2012, 01:39:57 PM »
 How much malt are you putting in there? Im thinking to much maybe.

maddspoiler

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Re: 2-Liter Volcano!
« Reply #4 on: August 06, 2012, 08:06:05 AM »
Should be around 100 grams dme per 1000ml water. Will yield around a 1.030 specific gravity starter.

Offline philm63

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Re: 2-Liter Volcano!
« Reply #5 on: August 07, 2012, 01:07:22 PM »
I use the standard 100g to 1L ratio for my starters, and I use a 2L flask. Still waiting for my stir plate... where's that darn UPS tracking number?!

Oddly enough; when I look back at my original post in this thread, I see that I stepped from a 1.5L to a 1L (oops...) Still, what a mess!
« Last Edit: August 07, 2012, 01:09:25 PM by philm63 »
On Tap: Oatmeal Stout, IPA
Fermenting: Air
On Deck: Kolsch

Offline brewfun

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Re: 2-Liter Volcano!
« Reply #6 on: August 09, 2012, 02:40:22 PM »
Two words: Foam Control.

A drop or two while the starter is above 180F.

Works every time.
Beer Appreciation is the space between pints.

Offline piper55

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Re: 2-Liter Volcano!
« Reply #7 on: August 09, 2012, 03:39:03 PM »
 That will do it

Offline alcaponejunior

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Re: 2-Liter Volcano!
« Reply #8 on: August 27, 2012, 04:50:03 PM »
Should be around 100 grams dme per 1000ml water. Will yield around a 1.030 specific gravity starter.

I've been doing this with every batch of liquid yeast so far.  I've been using a stir plate since batch 1 of liquid yeast though.  I have a two liter flask and have never even come close to a blowout.  I loosely cover with tinfoil that I've dipped into starsan.  All my yeast has been very active upon pitching, btw.

Caveat, sample size less than ten.  IANAE.

 

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