Hey how about let's give the guy some clear advice. (Apologies for my compadres, looks like a few have posted after drinking too much of their own product).
My 2c:
- Read the article on the earlier post - some good stuff there.
- Stuck ferments are a simple fix, rouse the yeast by grabbing the sides of the fermenter and giving it a rock & swirl - enough to get the yeast cake off the bottom and into the body of the wort. If your fermenter has plastic clear enough you should see it sitting there on the bottom in a white layer an inch or so thick. Don't open the lid, you don't want to open the beer up to infection/oxidisation, plus it's not needed at this point. You only want to open the beer up if you want to add a fresh yeast should this method not work - but you should try this first.
- After rocking, ramping the temp up briefly will also help a great deal. When I get a stuck ferment on an ale, I'll take the beer up to 20 degrees or even a touch above - maximum of 22 for one day. Ale yeasts like US-05 can cope with a little bit more heat but you don't want to push your luck too far. After doing a ramp for a day the yeast should have restarted and you can drop it back. Don't leave the beer longer than the time it takes to restart at high temp. Doing this will add 'fruity belgian style esters/flavours'.
- I've never had a skanky beer using the above method. Only had to add a fresh yeast on top once - so it's pretty fail-safe. That said it does depend on the yeast you use - each yeast pack has its own temp ranges recommended by the supplier. Check them out and get to know them. You will find tech sheets on sites like Fermentis & Wyeast if you're using those.
- Adding a fresh yeast on top is fine if all else fails and what you have done is not wrong at all, nor will it affect your beer or muddy it up. But most people would recommend a 'rock & ramp' method before going out to buy a second pack of yeast. Muddiness in a beer is mainly caused by people re-using yeasts from previous batches, not adding more yeast I have found. Yeasts degrade with each use unless they are managed right.
The reason the Homebrew guy screwed up his face was because you quoted the wrong number to him. What he said was correct. If you indeed had an FG (Final Gravity) that low the beer would have been finished and you would be bottling off a nice ale at that number.
As some of the guys suggest, a Final Gravity (FG) of around 1.016 would be fine. Even 1.018 is ok, but the higher it is, the sweeter your finished beer will be and the less alcohol you will have in your beer. You want to get those little yeasties munching through as much of the fermentable stuff as you can. Then it will taste as good as it can be and as close to the recipe or style you're aiming for.
Cheers & all the best,
Hopper.