I've had a cyser on since just before christmas, and right after new years, after reading a bunch of recipes I decided to up my honey content, so I added another few pounds to my 5 gal batch already underway. Well, since then, the SG has hardly moved at all (1.033 after addition, 1.029 today). The fermenter was still bubbling during this time, not as vigorously as it had been at first, but bubbling nonetheless.
Now, to possibly answer my own question, it DID get very cold in my storage room where my brews sit (54 degrees for a few weeks). Is this likely to have done any permanent damage, or should the process pick up again now that I've moved the whole process to a different, warmer room?