Stir plate II

[Gahr]

How big should the vortex in the starter be (relative to the starter size) to get good gas exchange when using a stir plate? Should it go all the way to the bottom? Is half way enough?

[WingStall]

Just a dimple in the top is perfectly sufficient. You are not using the stir plate for gas exchange. You are using it to keep the yeast in suspension.

[triple-oh-six]

Halfway is fine, it really doesn't even need to be that strong.
As long as there is a bit of a dimple you're pulling in some gas.
Just the stirring action alone is exposing more of the yeast cells to the o2 at the surface.

[Gahr]

Thanks for the quick answers. Getting the stir plate has really geared me up to start the new brewing season. Because that's REALLY the season to be jolly!

[triple-oh-six]

Thanks for the quick answers. Getting the stir plate has really geared me up to start the new brewing season. Because that's REALLY the season to be jolly!

fuckin A brotha, fuckin A