PLEASE take MasterDrummer's advice on this one. Rats are not easy pets to keep, but if you're willing to spend the time and money, rescue a few from a rat rescue. There's several listed on Petfinder.com.
Great, thank you all. I think I'll do a 75g with black sand, some bog wood, low-light plants, and fake rocks (since I have a whole bunch of them). Wish me luck, I'll try and post pics when I get everything together. :)
I have a very small bichir; he's only about 3.5-4" long right now, and I'm thinking about what kind of tank I'll need to set up this year to keep him in permanently. Right now he's in one that's far too small-- I took him in as a rescue from some moron, and figured it was better to keep him in...