The usage of "should" in test assertions annoys the pedant in me to an unreasonable degree. You're making an assertion, the "should" is implied! It's just redundant!
Businesses, if you have hold music please make sure it's compressed enough so the silent parts don't sit beneath the volume threshold and get cut off, making it sound like they've picked up again.
For my second batch of kombucha I did ginger-lime, 5-6 day 2F and got the tiniest bit of effervescence. Better than the first batch w/ just priming sugar. Still too sweet.