and as i think Hix pointed out, by covering over the original moats and using fences instead the zoo has delivered more space to the animals...
the exhibit has the capacity to hold up to two bull elephants permanently, but im guessing that it will be some time before, if ever that Gung has to share this exhibit with a rival (or son).
the space provided to Gung, plus the visits from the females and enrichment from keepers should keep him happy.