I appear to be in the minority here, but I found nothing impressive about the Georgia Aquarium other than the sky-high prices and very fresh tuna fish sandwich in their over-priced cafeteria.
I don't know how families can afford this attraction. I went with just my wife, and between basic admission and parking we put out just under $100.
My standard of excellence in aquariums is, and still remains, the Shedd in Chicago. The Shedd is curated with tanks small enough where you can see the various fish. Georgia may have big tanks that impress at first, but it becomes very hard to observe any one species in the scrum of all of the others.
My wife is in a wheelchair, and I will say that I was impressed with their "handicap parking" system for certain key exhibits. Even though ignored by most of the Aquarium-goers, the "parking" spaces id afford my wife a nose-to-the-glass view of the penguins and otters, which she greatly appreciated and doesn't often get to enjoy.