I brewed an American lager, Jamil's "what most folks call beer" on Saturday 1/9. My Gravity was on target at 1.046 and I added a smack pack of Wyeast Pilsen Lager. I added it to 68 degree wort and then placed in fridge to ferment at 50 degrees. I am seeing very little action from the airlock, not sure how much I should see as this is my first lager. My volume in fermenter is about 6 gallons. I will take a gravity reading on 1/13. If the gravity has not dropped much, would you recommend waiting a week and taking another reading, that would be 10 days into fermentation? Pitching an additional smack pack now because I did not pitch enough to start? Thanks for the help.
Generally you pitch twice as much lager yeast as you do ales.
The 18° drop could have shocked the yeast a bit
All is not lost bring the fermentaion temp up to the recommended high limit of your yeast strain (check wyeast site) to get the yeast woke up. Then you can nurse it to the lower primary temp range.
The under pitch may make more esters than desired, so secondary may take longer to clean it up.
Do all temp changes at 1° per hour.
Also in the future, check the use by date on the yeast. Most manufactures claim 50% viability at experation time. This effects your pitch rate greatly.