Strands have grown from the disk of culture like tentacles, after 12 hours. I think the culture is still living - not that it's falling apart. Going to keep an eye on it for anything untoward, like vinegar eels. I have been putting off researching what those really are. I should do that.
@stillinhere sounds terrifying!
Is this the Kombucha? Are eels floating at the bottom of a kombucha bottle? 
@generica @Zoonie It's very rare, but some people will use vinegar to get the ph of their first ferment to a certain level, and some people who are into the raw stuff use that. As long as the scoby is free of raw vinegar and I don't let the kombucha turn to raw vinegar, it will be fine. They're not parasitic anyway.