So I made a yeast starter in a 2l flask from harvested yeast this past weekend.
The recycled yeast was Wyeast London Ale. The equipment was a 2L flask with a double bubble airlock and #10 stopper. No stir plate.
This produced a fair amount of yeast in two days, but i noticed when i swirled the flask, a lot of bubbles went through the airlock, but none at other times when it was just sitting there. I see a stirplate in my future, but I don't have one just now.
So, do most people use an airlock on their flasks? It would seem that this might inhibit yeast growth somewhat. If there is no stir plate, would it be okay to leave the top open with perhaps a foil cover to let some air out and promote yeast growth? Also, since I don't have a stir plate to promote faster growth, should I plan on 2-3 days for the starter to produce enough yeast?
The recycled yeast was Wyeast London Ale. The equipment was a 2L flask with a double bubble airlock and #10 stopper. No stir plate.
This produced a fair amount of yeast in two days, but i noticed when i swirled the flask, a lot of bubbles went through the airlock, but none at other times when it was just sitting there. I see a stirplate in my future, but I don't have one just now.
So, do most people use an airlock on their flasks? It would seem that this might inhibit yeast growth somewhat. If there is no stir plate, would it be okay to leave the top open with perhaps a foil cover to let some air out and promote yeast growth? Also, since I don't have a stir plate to promote faster growth, should I plan on 2-3 days for the starter to produce enough yeast?