You may also be able to find DVD's of the individual tanks for under $10, which lowers the price of admission.
From the Amazon.com description:
The Exotic Aquarium
The Natural Aquarium
The Freshwater Aquarium
The Classic Aquarium
The Coral Reef Aquarium
All five programs can be found on Aquaria: The Complete Aquarium Collection.
For those who just can't wait for the Freshwater Aquarium to be released, this could be the next best thing. (Too bad you can run a DVD as a screen saver...)
