(re-resurrect a head shot zombie)
I thought I had read and watched all the videos there were for yeast starters, and I swear, I hadn't been clued in to blow off! I did a 1400ml starter in a 2000ml flask with a stirplate last night. This morning at 5:00am, I come down to check on my baby, and Doh! the foam stopper was off and foam was very slowing rising up an out. Not a really big mess, so maybe it had only recently happened?
I used sanitizer from a spray bottle to knock off the exposed foam on top, and rinse the outside of the flask. Then I rinsed the foam stopper in clean water, squeezed it out, and re-sanitized it in a sanitizer bath for a couple of minutes. Then I simply put the stopper back in.
After re-starting the stir plate, the foam immediately began to climb again, so I backed off on the speed until the rising stopped. It is being stirred, but there is no vortex, which brings me to my real question. Does it really need to have a vortex, or is a healthy stirring enough?
One more question. Since I don't really know how long the stopper was out, but the foam was still climbing out, indicating a decent outflow, do I need to be overly concerned that it was uncovered?
Thanks for any insight, and thanks for this great forum!