Two phases of home beer making involve bubbles. And if you are missing the bubbles on either phase, you could be headed for trouble with your brew. Depending on when you disover the problem, however, all is not lost.
The first phase is during fermentation. After pitching the yeast into your wort and letting the fermenter sit for at least 24 hours, you should begin to see foam collecting on the surface of your wort. Depending on the marterial in your wort, you may see a true flurry of bubbly activity inside the fermeneter!
This bubbly goodness is created by the brewing yeast that is added to the wort after cooling it. Always check the expiration date on the yeast packet before hydrating it, and if it's expired, toss it and use a new one, even if you have to "steal" it from another can of malt.
If you don't see any bubbles forming in the fermenter after 24 hours, your yeast may be bad. At this point you could try hydrating another packet of yeast and tossing it in. At best you've saved your beer! At worst, it was going to be bad anyway.
The second phase where you might see bubbles is during bottling. However during bottling, the caps are fastened tightly, which keeps the carbon dioxide produced dissolved by pressure within the beer....the bubbles are not actually seen until the cap is removed, which releases the pressure, bringing dissolved bubbles out of the beer...what we know as carbonation!
I hope this helps you solve some of your "no-bubbles" problems!
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