So I know my process wasn't perfect, and I've identified all the miscues I know of below. I'm not sure if one of these, or perhaps something else, is causing my problem.
I just tried (and did a poor job of) a starter for the first time on my Russian Imperial Stout (OG 1.097). I didn't begin the starter until way too close to the brew itself, I had maybe 4 hours from when I was pitching my yeast into the erlenmeyer to the point where I was pitching the starter, and the Wyeast pack had only been out of the fridge for an hour when I pitched it into the flask.
Pitching into my wort was at 2am on 1/1 (43 hours ago). I used my O2 stone for 60 seconds, full bore. At the 20 hour mark I used the O2 stone again, another 90 seconds but at a much slower release rate. At the 30 hour mark I had no sign at all of fermentation, so I pitched another Wyeast pack into the wort (straight from the pack, the pack was out of the fridge at room temp for 12 hours and was nice and fat), that was 13 hours ago.
Any ideas what's wrong? Any suggestions?
My ideas what could be wrong were that the OG might be too high for the yeast (I think this is not it, that fact might prevent going down to the terminal gravity I want, but shouldn't prevent fermentation from starting), or that I botched the starter enough that the yeast won't ferment, and the second pack was out at room temperature for too long and also won't ferment. I pitched the yeast into my starter at 70 degF and roughly the same for pitching the starter into the wort, and the second pack was pitched at 68 degF. While I can't rule it out, I am pretty careful about sanitization, so I doubt that is the issue.