Looking at suggestions for setting up a 6ft display tank for Gibberosa.
Maybe set it up as close to a natural habitat as possible. Maybe.
I agree with you regarding as close to a natural habitat as possible.
However, considering that they are a deep water fish for the most part and there's not much out there showing that habitat, maybe consider a natural Tanganyikan Cichlid look.
I always liked the look of rounded boulders all piled about.
This will help eliminate the chance of injuries from sharp edged rocks as Mike mentioned above.
Somewhere there are pics of my 190 set up with a bunch of round field stones....it was an mbuna tank but the rock structure is the same as I described.
One thing's for sure, you'll have to definitely take pics and share them.