Beer Forum • View topic - Rousing yeast using a stir bar in the carboy

mordantly · **Posted:** Sat Jan 07, 2012 7:43 pm

i put a full carboy of water on my lab plate once for shits and giggles. i put fermenters on my 4-wheel dolly and roll them around the garage.

Cliff · **Posted:** Tue Feb 07, 2012 3:55 pm

animaldoc wrote:

[
Yeah ??? Would you really?

I don't think so. You only need a stirplate strong enough to spin the bar. We're talking rousing the yeast. We're not trying to vortex and aerate a 5 gallon starter.

Quite so. Except the poor little stir bar will be buried in an inch of thick cake.
You'll have to move it against that.
I think the law of large numbers is against you.

28paws · **Posted:** Wed Feb 08, 2012 12:19 pm

Without ever having tried it, it seems to me that if you could get the stir bar to actually spin before the cake was formed that the cake would form around it.

Cliff wrote:

animaldoc wrote:

[
Yeah ??? Would you really?

I don't think so. You only need a stirplate strong enough to spin the bar. We're talking rousing the yeast. We're not trying to vortex and aerate a 5 gallon starter.

Quite so. Except the poor little stir bar will be buried in an inch of thick cake.
You'll have to move it against that.
I think the law of large numbers is against you.

spiderwrangler · **Posted:** Wed Feb 08, 2012 2:36 pm

I don't think it was mentioned, but most carboys have a bit of a domed bottom, so unless you have the proper stirbar, keeping it centered would be difficult anyway...

Rousing yeast using a stir bar in the carboy

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