(Sorry if this is common knowledge, but I've tried many searches and can't seem to find an answer to this in any of the threads about starters and stir plates.)
I made my first starter last night and have had the flask on a stir plate for about 12 hours, with a nice steady vortex. There's 750 ml in the flask (it's a 1 liter flask), 75g of DME and 1 tube of White Labs WLP001 California yeast (very fresh). The beer it'll be going into will be a Ruination IPA clone, with target OG of 1.076.
So, my basic question is how long should I keep it on the stir plate? Is there a general rule of thumb for this? And, what's the best way to determine if fermentation in the starter has begun? Do you just turn off the stir plate and wait until fermentation foam is seen?
I made my first starter last night and have had the flask on a stir plate for about 12 hours, with a nice steady vortex. There's 750 ml in the flask (it's a 1 liter flask), 75g of DME and 1 tube of White Labs WLP001 California yeast (very fresh). The beer it'll be going into will be a Ruination IPA clone, with target OG of 1.076.
So, my basic question is how long should I keep it on the stir plate? Is there a general rule of thumb for this? And, what's the best way to determine if fermentation in the starter has begun? Do you just turn off the stir plate and wait until fermentation foam is seen?