One thing that I noticed no one mentioned is getting an actual cage with levels. I was always told that it is a no-no to keep rodents in aquariums.
I year or so ago I posted a thread asking to know everything about Rattie care because I was thinking of getting one... everyone suggested a wire cage with atleast 2 levels.


Also, many rat owners rave over the Suebee diet... here's a link to a "recipe"

http://www.ratsrule.com/diet.html