Here is a little diagram. Sorry it's bad I just drew it up on my phone.
The closet is my bedroom closet, so no fish tank in there. However the sump we are planning on going under the tank, we also have a pass through that goes to the underneath of the bathroom counter, where we will have a rodi, mixing station and whatever else. The issue is we can't get a sump under there that will fill up the whole space, only about 1/2 the space.
We also are going to do a full wall on the gameroom side but it is going to be completely open on top for my bedroom side.