Eliza shrugs. "Sure we can. Something or the other, though I'm not sure we'd quite agree on what that should be. But maybe better to do that somewhere safe and for the record, if you don't plan leaving us here, that is."

When Jessica tries to speak to the tank, Eliza notes: "You should open the door if you want to have any effect."

Spoiler: If you open the door
Show
The water held in the tank does not rush out or anything. It just stands there as a vertical wall with a bit of ripple. Repeating the call is met with a distortion in the flow of bubbles in the depths of the tank, then near the open door and then... well, that's it. Nothing is said back at Jessica.

"Not quite sociable, you see. I told you."

Still, Jessica feels she gets some attention.