Originally Posted by enderwig
Lagers don't usually go all kinds of crazy like ale can. They are usually lowkey, drawn out ferments. If you went from 1.050 to 1.047, the yeast are doing what they do, just leave them be for a few weeks. Lagers can take 3-4 weeks for primary fermentation sometimes.
Yup. Your beer is fine...
Besides the fact that Bubbles in the airlock, mean absolutely nothing. It is a valve to release excess co2, NOT a fermentation gauge...since you are brewing in a Lager (In a fridge perhaps?) things are slower, since the yeasts are colder, also any CO2 developing is sitting heavy on the beer, and DOESN'T NEED to vent
Read this and the links for airlock info http://www.homebrewtalk.com/1388434-post9.html
Fermentation is not always "dynamic," anyway, just because we don't see anything happening, doesn't mean that anything's wrong, and also doesn't mean that the yeast are still not working dilligantly away, doing what they've been doing for over 4,000 years....the yeasts are busy for a long time doing what they need to do.
You took a reading...the gravity has changed, that means it is doing what it is supposed to be doing.
Lagers are slow things....