Sad, sad news for this girl. She got root rot this week. My air conditioner went out for a couple days on the hottest days of the year, so maybe that's why she got rotten. But I noticed on Thursday and have been fighting it ever since:
Rinsed roots in fresh water.
Changed bucket water.
Removed worst affected leaves.
I'm hoping that I can save her and she didn't get stunted too bad. I've been checking her roots twice per day and they are looking much better, and the new leaf growth is looking pretty good.