Yeast Starters

When doing a yeast starter on a spin plate what volume do you most use for a 5 gallon batch? Ive seen mostly 2 cups water to 1/2 cup DME.

Then leave on the stir plate for about 1 day?

Size via yeastcalc.com and make the starter wort with a ratio of 100g DME to 1L water. Time for it to finish depends on yeast age and such. Depending on the size of your flask, you might need to do a two, or three, step starter.

Generally, I cold crash for a full day between steps, or once the final step is done before decanting the spent starter wort and then making a slurry of the yeast cake. Leave a small amount of spent starter in the flask, to get the yeast into suspension.