Congratulations! I hope you had fun. Making beer rocks.
- No, adding the sludge would not have increased your OG. You probably added too much water or did not boil vigorously enough (or you measured something wrong.) Don’t sweat it.
a) OG is determined by fermentable sugars in the wort. If you use a lot of extract in the boil or grain in the mash, you will have a higher OG. If you use less grain, you get a lower OG, and a lower amount of alcohol in the finished product.
b) OG basically correlates to the amount of alcohol in the fermented beer. So you will have a weaker beer, probably about 4 percent by volume, though it depends on what yeast you used.
- You do not need to use a second fermenter for most beers, only high-gravity beers or beers that otherwise age for more than several week. You will be fine. Add the dry hops after the air-lock quits bubbling regularly.
a) I usually ferment for one week, then dry hop for two weeks all in the same bucket. Basically, once the primary fermentation is over (it should be over in a week), the air lock quits bubbling very often. This means less C02 is being produced. If you add the hops while gas is still being produced, it lessens the amount of hoppy goodness that will infuse the beer. So wait a week, then dry hop for two weeks (at least) then bottle and keg.
GOOD LUCK! I am sure your beer will be great.