Author Topic: Starter blowoff  (Read 1216 times)

Offline petermmitchell

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Starter blowoff
« on: November 24, 2013, 10:12:45 AM »
I have been getting a lot of starter blowoff lately (particularly with wlp530) and had a few questions:
1.  Could turning my stir plate to max setting be contributing to this?
2.  Could this significantly affect the amount of yeast I am pitching?   

Any additional advice would be much appreciated!  I tend to brew bigger beers (> 1.070) in general so I want to make sure I am pitching enough yeast to avoid stuck fermentation. 

Pete

Offline denny

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Re: Starter blowoff
« Reply #1 on: November 24, 2013, 10:20:04 AM »
I'd say yes and yes.  Why not get a bigger starter container?  I have a gal. glass jug that cost next to nothing and works great on my stir plate.
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Offline Jimmy K

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Re: Starter blowoff
« Reply #2 on: November 24, 2013, 01:04:26 PM »
I also would worry that if you're filling the starter container and-or blowing off them you're not getting enough oxygen into the starter to create healthy yeast.


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Offline petermmitchell

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Re: Starter blowoff
« Reply #3 on: November 24, 2013, 02:15:27 PM »
Thanks!  I will use a larger vessel and turn down the stir plate speed in the future.  The reason I was asking is that I just made a 3 liter starter in a 1 gal glass jug for a 5 gallon batch of Belgian dark strong ale (OG 1077).  I left the starter on the stir plate for 2-3 days and had a lot of blow off.  Then I cold crashed it for 36 hours to decant off the spent wort.  I pitched the remaining slurry and aerated thoroughly with a mix-stir bar on the power drill.  I am hoping everything works out and it won't get stuck. 

Offline Jimmy K

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Re: Starter blowoff
« Reply #4 on: November 25, 2013, 07:31:41 AM »
3L in a gallon might be enough headspace, just slow down the stir plate. You just need enough motion to create a dimple in the surface. Also, if you're not doing this - cover it with foil instead of an airlock to let oxygen in.
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Online Steve in TX

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Re: Starter blowoff
« Reply #5 on: November 25, 2013, 08:17:51 AM »
This just happened to me for the first time last night/this morning. WY2565, 4 liter starter in a 4 liter flask. This flask gas a decent amount if head room, but I guess not enough for 2565.

This was a step up using 2/3's of a crashed and decanted two liter starter. Two liter starter was a touch foamy, but didn't spew.

I guess I should of expected it. In the past 2565 foamed when I looked at it sideways in the fermenter. I was changing blowoff sanitizer for 5 days.
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Offline dkfick

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Re: Starter blowoff
« Reply #6 on: November 25, 2013, 09:23:08 AM »
You could always use foam control as well.
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Offline Pinski

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Re: Starter blowoff
« Reply #7 on: November 25, 2013, 09:33:38 AM »
You could always use foam control as well.

+1, Fermcap in your starter really let's you maximize your starter vessel space. 
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Re: Starter blowoff
« Reply #8 on: November 25, 2013, 09:53:41 AM »
I have a gal. glass jug that cost next to nothing and works great on my stir plate.

Hitting the Carlo Rossi jug wine?

I'm not so big on foam control.  I'd go with a larger vessel.  If you have growlers, you could split your starter amongst a couple of those.  Lord knows I've got growlers.
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Offline denny

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Re: Starter blowoff
« Reply #9 on: November 25, 2013, 09:58:02 AM »
I have a gal. glass jug that cost next to nothing and works great on my stir plate.

Hitting the Carlo Rossi jug wine?

Apple juice, man.  This is Oregon.
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Re: Starter blowoff
« Reply #10 on: November 25, 2013, 09:59:55 AM »
I have a gal. glass jug that cost next to nothing and works great on my stir plate.

Hitting the Carlo Rossi jug wine?

Apple juice, man.  This is Oregon.

That was my second guess, but not as fun to throw out there.
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Online Steve in TX

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Re: Starter blowoff
« Reply #11 on: November 25, 2013, 11:03:05 AM »
You could always use foam control as well.

I have never added foam control to a stirred starter because I don't think it would work. Foam control works be sitting on the surface. If the starter is constantly spinning it can't do its thing. I could be wrong
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Re: Starter blowoff
« Reply #12 on: November 25, 2013, 11:05:16 AM »
You could always use foam control as well.

I have never added foam control to a stirred starter because I don't think it would work. Foam control works be sitting on the surface. If the starter is constantly spinning it can't do its thing. I could be wrong

Yes, I think you're mistaken.  It works in the boil as well, which is spinning pretty well, too.
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Offline dkfick

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Re: Starter blowoff
« Reply #13 on: November 25, 2013, 11:05:30 AM »
Foam control definitely works in a starter.  If you're worried about silicone from the foam control you could always use an oil based one.
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Re: Starter blowoff
« Reply #14 on: November 25, 2013, 11:08:32 AM »
I've never had much foam in a stirred starter before this round with 2565.
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