Doing my first starter with a stir plate. How fast do I want to spin the stir bar? Do I need to vortex to actually get down to the stir bar and suck air or just almost all the way there?
From what I understand, you don't need a huge vortex. Just a little dimple on the surface provides the oxygen exchange that is needed. I usually dial mine in to about a 1/2 to 1" vortex.
