I have a copper ale (starting gravity: 1.058) that took off like a rocket within 12 hours of pitching Safbrew S-33. It's my first all grain brew, and also the first time I've rehydrated before pitching. It got going quickly, so much so that it bubbled almost half a gallon out of my carboy through the blow off tube (that's never happened before). It was still bubbling and churning like crazy when I checked on it last night.
Now, this morning I checked on it and it's slowed significantly. There are still bubbles coming out, but it is nothing like it was last night. Is 48 hours (maybe a little more) long enough for a 1.058 OG beer to be nearly finished? If so, that S-33 must be some killer yeast.
So, should I be worried? I'm hesitant to take a hydrometer reading b/c I want to long primary this batch and not risk infection. Thoughts?