Originally Posted by cherrob123
I don't mean to hijack this thread, but it's really kind of in the ball park of what I need to know.
Once I've made my starter and pitched the yeast, should I run the stir plate constantly and if so, for how many hours? Days?
It really depends on how big of a starter you need and what you are starting from. A 1 liter starter can be pitched at high krausen or about 12-18 hours on a stirplate. I would decant anything larger that 2 liters so about 18 hours on the stirplate and a day or two in the fridge to let the yeast settle.
I also propagate yeast from frozen vials of about 10 ml yeast. I have to step up 3 or 4 times so that takes a week even with a stirplate.
I made my DIY stirplate from an old computer and some other items and spent only $7.40. Fan, hard drive magnets an old cigar box - free. A rheostat and knob from Radio Shack and a some nuts and bolts from Walmart. Happy yeast ever since.