Pressure inside a tank of heavy water

[M4573R]

1. The problem statement, all variables and given/known data
If the pressure inside a tank of heavy water is raised by 1 atmosphere, what happens to the tank?


2. Relevant equations


3. The attempt at a solution
Not sure where to start.

[aerospaceut10]

Is there more information to the problem?

[M4573R]

No, but here is all of the text:
The Evil Physics Monkey takes a giant inflatable dinosaur down to the bottom of
the tank, ties him there, and inflates it, raising the pressure by 1 atmosphere. What happens
to the vat of heavy water (quantitatively)?