I made my first yeast starter and after 18 hours I noticed there is no foam on it. I made a 1 lt starter and used a stir plate. It looks a lot clouder than when i started. How do I tell if it worked or not?
Take a gravity reading of the sample... if its low, then it fermented. Sometimes starters won't create much, if any, of a krausen. Plus, one packet of yeast is a lot for a 1L starter, likely it just fermented out super fast.
__________________ I love the sound of an airlock bubbling in the morning. It sounds like.....VICTORY.
Originally Posted by TxBrew
It's now degenerating into nu uh and uh huhs and it no longer serves a point.
I've been doing starters for years and found it rare to see krausen.
One visual way to tell if it is working is to turn off the stirplate and view the white layer at the bottom of the flask. Is there more there than before? Not as accurate as gravity, but if it's a good starting gravity and good yeast, it will eat the sugar.
I start with a 1.040 starter fluid (DME) and usually make 1.2L of wort for 1 pkg or vial of yeast. Stir it up for 12-18 hrs. Decant and repeat if you need a big starter (lager or high gravity ales).