Find a large sheet of cardboard, or tape smaller pieces together.
Then cut it to exact size of tank.
Then practice moving it.
My guess: It has to go straight in the door, then straight back. There is no way to rotate it in the room.
Although you could move it on its front face, then tumble it backwards onto the bottom.
That might make it easier to fit in door.
If you have hardwood floors, felt pads slide reasonably easily if it is empty.
So you could put it on the stand, then move it against back wall.
Make sure to leave extra space behind tank for pipes and such, then leave just a bit more.
You never have enough room.
Beware of moisture build up melting your drywall. Big tanks do that.
I stapled plastic sheeting to the wall in the alcove where my tank went.