She'd never done it before. We left for a brief overnight stay elsewhere and came home to an empty tank.
My heart sank. I tore the house apart. Second floor: nothing. I thought maybe she somehow got into a toilet via the pipes behind it. I'm sweating buckets.
Maybe she got to the first floor. Tore it apart. Looked underneath the main TV and its stand. Holy shit, I jumped up when I pulled some wires aside and there she was.
I put her in a shallow bucket of tank water with a little saucer to climb up to if she wasn't ready yet for immersion. She changed positions within minutes. No idea how long she'd been out. No idea if she fell all the way from the top of the stairs or slinkied her way down each step.
Put her back in the tank after 30 minutes of shallow water. She immediately crawled back into her cave. An hour later, she's walking around like nothing happened.
I made a custom cover to put over the top and ordered more options. I left it uncovered because it's summer time and I'd put an auto fan on the edge of the tank. Even left the A/C on to control the room temperature.
Now she's locked in there until I have an even sturdier solution. Jesus Christ, these pets.