Chicago Vivarium Store
I went to an excellent new store yesterday called Destinations of Life, on Ravenswood and Balmoral. It's a small space so he does not have a huge stock, but he has a nice variety. I don't know how his prices would compare with the rest of Illinois, but they are very good for the city. They're actually comparable to prices I've seen online. He has a small fish selection (nothing too exotic, though he does breed his own angelfish), reptiles, dart frogs, terrestrial and aquatic plants, a huge selection of air plants, wood, and various supplies. He also seems very knowledgeable. I'm going to be setting up a live plant vivarium for a crested gecko soon and he had great advice. I highly recommend stopping by for a visit if you are in Andersonville.