I insulated this wall to lesson noise transfer into our living room and utilized green bath wallboard.
And after taping and texturing to match the rest of the room.
This next photo shows the stand completed, painted and ready to bolt to the wall. Also, the walls were painted and 3" base-boards enamel painted and attached. I then silicone sealed around the room to contain any spills to this room.
Next we have the stand attached to the wall with top in place. Note the overhang for plumbing, a place to place things while working and a good knee/foot support while salt water swimming. Also, note the paranoid excessive use of screws on the stand. The top indentation is for plumbing routing as you will see in coming photos.
So it's time to place the tank into "the hole". It had to be put in place through the hole, as there was no way to get it into the fish room (this was planned) due to a tight spaced hallway. So here's a shot with it in the right position to be inserted. Looking through the opening you can get an idea of the orientation of the room. Sink at right, entrance to the left and a handy closet in the middle. There's a window to the right of the sink you will see in upcoming photos.
So now you are saying to yourself, "that's going to be a tricky situation get that monster through a hole that has all of 1/4" clearance at the top and sides". True... if not for.... ROBO HOIST!!!

Here’s a couple shots of it and a couple of the tank in place on the stand.