I know some of the people that work there. They are not underpaid, fresh out of college aquarists. The number of shark deaths is highly irregular, and I'm sure they will be investigated by the AZA. Their membership in the AZA will most likely be pulled. The ozone deaths are very odd, and my guess is that their engineering department is going to be fired. In public aquariums with huge tanks, they don't really do water changes, as it is much too expensive. Water is pulled from the display tank and placed in holding vats, there it is treated with ozone, UV and other sterilization methods before being returned to the tank. It sounds like there were some severe communication issues between the engineers and the husbandry staff as to what stage the water was at.