Fish Bowl Pets in Stamford
Thought I'd mention it since not listed. Fish Bowl Pets in Stamford carries a lot of fresh water and, to a lesser extent, salt water fish and aquariums. It looks small on the outside, but is pretty big inside. Pricing is pretty competitive with online and much better than Greenwich. Fish are well kept and they also have aquatic plants.
Worth a trip if in the area. I get all my fish there......occasionally go to Petsmart for supplies if I don't want to drive across town.