After visiting a the National Zoo and Aquarium, I am not surprised to find another thing that Canberra could fix - the Aquarium itself. I do not know whether it was poorly designed, or poorly constructed, but according to one of the staff, the walk through area had a leak, and was closed. This has closed indefinitely. Canberrians used to speak of going to the new Aquarium when it first opened and looking at the fish swim around you. This is what you can expect of it now:
If you want to go to one that "works", try going to the Aquarium in Melbourne. The National Zoo in Canberra should also update their website. It does not appear to have been updated since 2007, and it claims to have the largest saltwater tank in Australia at 220,000 liters. They did not take into account the 2.2 million liters of the tank in Melbourne.