Originally Posted by paraordnance
I'm not in the group who counts bubbles during fermentation. I stoped using airlocks a while ago, carboy cap or foil over the neck of carboy does everything that airlock does, not to mention that you will never have a liquid sucked back or it will dry out. I use carboys exclusivelly so I monitor my fermentation progress based on a swirling/activity inside, I noticed that this method is far more reliable than bubbles or krausen, when in doubt I pull out my hydrometer
A foil cap does not do the same thing that an airlock does, not that I'm saying that an airlock is required, but an airlock creates a one way valve for gas to escape the carboy without being replaced with air from the native environment.
I hope that my LHBS has dry lager yeast...last time I checked it out they only had a few strains of dry yeast for beers. I have one packet that came with the kit I can use.
Will there be a problem with mixing yeast strains? Differing flavors? Diacetyl levels, etc?