The way fermentation works, as
a tour guide in a winery once graphically put, it is that the yeast eats up all
the sugars and craps alcohol. As a consequence, fermentation will be finished
when the yeast has finished eating all or most of the sugar in the wort (ie, the mix of water and hopped malt extract). Therefore, if
you try the beer and it tastes sweet, the yeast is not done eating.
Luckily, my Diablo IPA tasted
like it should, like still beer. It was therefore time for the secondary
fermentation, which would give it the carbonation it so desperately needed.
Since the yeast has at that
point eaten mostly all of the sugar in the beer, you have to add more of it for
their to be more fermentation. I added two and a half teaspoons of sugar to
each of the previously sanitized bottles and filled them up with my still beer.
Even at that moment, you can
already see carbonation starting to happen, as by the time the bottle is filled
you already have a small head of foam. However, you should leave the tightly
closed bottles in a dark and cool place for anywhere between one and two weeks,
to ensure the beer is fully carbonated.
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