Well, I was looking around the site:
http://www.ecoaqualizer.com/prod12.html and found it amusing that it eliminates _monthly_ water changes.
They have a money-back guarantee, so I guess if you think it sucks you could send it back. Kind of sounds like a "blind you will pseudo-science" marketing strategy.
Interesting that the quote is from the aquarium curator at Houston zoo, which isn't the larges aquarium in Houston.