[DiverDude]

This is a great idea; a tank like that would be relaxing and keep their attention for quite some time.

As expensive and challenging as building and stocking a tank like this is, it's really the easy and inexpensive part. Operating and maintaining it is the real kicker. The hospital will need long term commitment from someone they can finger for all aspect of the tanks' care. Electrical, water, salt, food, etc. all need to be accounted for as well.

From the hospital's perspective, this could only be considered if all those factors were suitable accounted for -and that's going to be difficult.

I hope this pans out but don't be discouraged if it doesn't. Bureaucracy is almost as powerful as the ocean itself.