Empty center Pygmy Hippo pool

Here is the center pool in the pygmy hippo house, again emptied for cleaning purposes.
NOTE: its a little deeper then the other pools and also has stairs insted the ramp like steps in the other two pools. I thought this maybe the case as when the house was built, it was built for the pygmy hippos, malayain tapirs and also brazillian tapirs. So maybe this pool is a little deeper as it was originally for the hippos to have and the other two are shallower as they were for the two tapir species. This is just an guess i thought off.