All the public aquariums that have the luxury of pumping in water from the ocean are usually pretty nice.
This one doesn’t they make their own water i took a look behind to see the filtration and they use redsea coral pro (black bucket) for salt and radion g4 for lighting (on the coral tanks) its very possible they get fresh saltwater delivered daily for all of the other tanks
its in middle of Mexico City (the capital of Mexico)
the closest beach its a hour and half away