So I'm making my first lager. Fermented at 48F for 4 weeks. Did a diacetyl rest for 48 hours at 60F. Racked to the secondary, and slowly lowered the temperature to 35F. I've checked on it periodically and there seemed to be no airlock activity. Now, 2 weeks into lagering there is airlock...
Is my beer infected with lactic bacteria? Found these floating around a few days ago. They look like flakes of peeled off skin floating on top of the beer.