I'm new, so I have been trying to read as much as I can, with out reading everything.
In reading many of the post, I see allot is mentioned about sanitation. Many of the pics I see are in open jars, or lids slightly hanging off. I understand why you can not close a lid on the jars.
Has anyone ever tried growing the yeast in a 2000 ml glass beaker, with a blow off tube? I use a product called star san that sanitizes all my beer equipment. When I grow my yeast for beer, I take the initial yeast culture, some wort(pre-beer) and keep stepping up to the amount I need. I use a stir plate made from a computer fan, with high powered magnets, and a stir a stir bar in the beaker. The stir plate keeps the the yeast moving and oxygenate, which promotes faster growth.
Can anyone see any downfalls to doing something similar to this with the yeast culture I bought from sourdo.com today? It seems a closed beaker, and sanitizing would cause no contamination.