RighteousFire
Well-Known Member
This is the first time I have made a yeast starter using a stir plate. I started with a 1.25L starter in a 2L Erlenmeyer Flask with a 2 inch stir bar on a homemade stir plate. I used a computer fan on a potentiometer to regulate speed.
I'm making a stepped starter for a lager using Wyeast's Urquell Lager strain, which was only a month old. I used Mr Malty App to calculate a ~200 billion cell yield then I would chill the yeast down and pour off the used wort to add fresh wort to bring the cell count up to ~400 billion cell count for pitching.
I haven't noticed any yeast activity like I have seen out of some peoples stir plate starters. I left it in for 24 hours, and then added 400ml more of wort to "freshen it up" a bit today. I also moved it from the 60F garage to the 70F kitchen counter to help. It has been at the lowest possible speed, which was kicking up some bubbles with the 1.25L, but now with the extra wort there are no bubbles.
Am I freaking out too much?
Was it too cold? (I've made regular starters at this temp with activity)
Was the whirlpool to much?
Thanks!
I'm making a stepped starter for a lager using Wyeast's Urquell Lager strain, which was only a month old. I used Mr Malty App to calculate a ~200 billion cell yield then I would chill the yeast down and pour off the used wort to add fresh wort to bring the cell count up to ~400 billion cell count for pitching.
I haven't noticed any yeast activity like I have seen out of some peoples stir plate starters. I left it in for 24 hours, and then added 400ml more of wort to "freshen it up" a bit today. I also moved it from the 60F garage to the 70F kitchen counter to help. It has been at the lowest possible speed, which was kicking up some bubbles with the 1.25L, but now with the extra wort there are no bubbles.
Am I freaking out too much?
Was it too cold? (I've made regular starters at this temp with activity)
Was the whirlpool to much?
Thanks!