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Originally Posted by Johnnyv
Hello ,this is my first post ,Im glad I found this site it`s awesome, But I have a question, im brewing My first bach of lager and I chilled the wort to 65 degrees before adding the liquid yeast smack pack ,then refridgerated it to 46 degrees,its been 48 hours and still no bubbles..... My question is does the low temperature make it take longer to start ? does lager yeast take longer to start? is it a combination of the two? also if I wait a week and there is no activity is it ok to repitch another pack of yeast? im thinking that the smack pack wasnt good because I smacked it 4 hours prior to pitching and it never swelled. Thank`s
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Airlock activity or lack or is not a true indication of fermentation, your hydro is the only way to tell...Some beers bubble, some don't... The only way to tell is to take a reading...
Low temps do slow fermentation...
Next time you smack a pack you should make a starter...
I've just looked at the temp ranges of various lager yeasts and it looks like the range is 48-65 depending on the yeast you used...so 46 may be too low for the yeast you used....it will take eventually, but if the bottom end of your lager yeast was in the 50's it will take longer, so check the range for your brand of yeast..
You may need to bring the temp up a few degrees and it will jumpstart.
If you've done that and still nothing changes on the hydrometer after a couple readings then you could repitch...although I'm not a fan of doing it myself. In ales, usually just rousing the yeasts and warming the fermenter gets them going, but I can't say about lagers....