Well, filter's off for the time being, and Genesis is in his new home.
I'm surprised; he's not clamped or anything, and he ate when I gave him a pellet. I thought for sure he'd be freaking out or something, but I guess he's just liking his new space.
One thing I have noticed is he tried to squeeze behind the filter. And did so at the bottom successfully. I'm positive he can't fit through the tighter spots (it's suctioned to the side of the tank, and there's really no room between tank and filter at the top), so I guess there's not a whole lot to worry about.
...He's also completely terrified of the lamp, I think, so I'll be leaving that off, too. lol