Bear in mind that balanced connection doesn't eliminate the ground loop. That still exists in the screen of the balanced cable.If headphones on the focusrite sound OK, then a jensen ISOMAX or similar device onthe last page could be what you need.
You could have two of the Chinese jobs clown earlier, and 10M of XLR between them, with 1M on each end.
It simply makes *that* (balanced) connection immune to the noise. Any remaining unbalanced connections - including the 1m on each side - could still pick up the noise. So the 1m on each side should be more like 5cm on each side