Sorry, I'm not trying to pick a fight.
I'm just saying ... I think the tank is fairly well done, all things considered. The rays, from what I can tell, don't seem stressed to me. There is a lot of open swimming room and ultimately the more reef like structures they had in there would take away from being able to see the rays.
The outside rim of the tank is concrete but it's only for about 2 feet or so. It's like a hot tub where you sit on the outside perimeter of the tank. They swim up to this part and then you can see the rays up close.
But inside of this, the 18' diameter or whatever it is left of the circle, is a white sandy bottom.
There's apparently a banded catshark in there but odds are nobody will ever see it because it'll just hide under the rockwork that is already there.
It's just I've heard already several criticisms of the tank, and .. well .. I dunno. I guess one can't make everyone happy but I was thinking that this is a decent first foray into the saltwater domain for the zoo.