I have done over 2 liters in mine, using fermcap-s to help control krausen. The trickiest part is boiling the wort without getting a boilover. Even with fermcap in there, it's a close thing.
How exactly did you get "over 2 liters" in a 2 liter flask?
If I need a bigger starter than that I'll decant and add more wort.
The 2 liter line on a 2 liter erlenmeyer flask is at around 3/4 of the height of the flask. There is still some more space in the flask above that line.
I am pretty sure that doesn't actually work like you think it does. Unless you have more than one flask, that is. The yeast grow to occupy the available volume. If you decant and just add more wort, you automatically have enough yeast to occupy the volume, so you don't get any more viable cells by doing that.
Nice trick MrManifesto. I never thought of that, but I will add that to my bag of idea's.
Thanks
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