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-   -   Yeast starter blow off (http://www.homebrewtalk.com/f163/yeast-starter-blow-off-291489/)

jimhall01 01-03-2012 09:24 PM

Yeast starter blow off
 
I have brewed a few higher gravity beers now. I only have a 2,000L flask. So, I sometimes have to step them up another time. On the second starter they foam over and blow off the sponge. It looks like I'm losing a decent amount of yeast here. Now I don't know if I really grew my intended amount of yeast. I usually do starters of about 1500L for this flask each time. Am I doing something wrong or do I just need to invest in a bigger flask?

badhabit 01-03-2012 09:36 PM

The Erlenmeyer will do this a lot if fluid level is anywhere close to the top. If I need to step up 2x I decant the spent wort, retaining the yeast and add new wort so that my fluid level stays below 1200ml, but even then you have to watch it.

Seven 01-03-2012 09:40 PM

Are you using a stir plate? The the vortex created by the stir plate will usually keep the krausen in check. If you are using a stir plate then I'd say to invest in a larger flask and/or try using fermcap to control the foaming.

jimhall01 01-03-2012 10:04 PM

The most recent one was the first one I did with a stir plate. I could get a bigger flask. What's fermcap?

Sulli 01-03-2012 11:42 PM

Quote:

Originally Posted by jimhall01 (Post 3624328)
The most recent one was the first one I did with a stir plate. I could get a bigger flask. What's fermcap?

Foam Control (FermCapS) (1 oz) | MoreBeer

Awesome stuff!

xdfireguy 02-08-2012 05:36 PM

Had my first blow off... maybe I should start using fermcap in my starters. Left this morning with a little trickle coming out from under the foil. 4 hours later:

http://www.homebrewtalk.com/members/...4hrs-later.jpg

It took the foil cap right off the top! That's 1600ml of 001 ~20 hours in.

LandoLincoln 02-08-2012 05:41 PM

I usually get a significant blowoff with all of my starters. I really don't worry about it. I put a piece of wax paper on top of the stir plate and put the stir plate in a plastic tray to catch everything.

jimhall01 02-15-2012 08:10 PM

That's what I did, too, but I found that it was losing yeast through the blow off which sort of defeats what I am trying to accomplish. I think I just have to keep it below 1500ml.

overdbus 02-16-2012 03:28 AM

I know it's kind'a crude but a 1 gal growler may work better
for large starters.

241 12-04-2012 03:45 PM

Quote:

Originally Posted by LandoLincoln (Post 3759589)
I usually get a significant blowoff with all of my starters. I really don't worry about it. I put a piece of wax paper on top of the stir plate and put the stir plate in a plastic tray to catch everything.

genius. woke up today with blowoff crud all over my stir plate. fermcap next time and wax paper. noted :tank:


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