lowdownsouth... there are some really nice places around atlanta. Go check out the Fish Store and More in Buckhead. They are a$$holes and really overpriced though.
Aquarium Showcase near Roswell and Alpharetta has some great stuff. Guy used to own Fish Store but is really cool and prices aren't insulting.
Petland in Dunwoody is an ok attempt at SW knowhow. But, they are overpriced. A couple of nice mushrooms though.
Marine Fish on Johnson Ferry near Sandy Springs in East Cobb has some great stuff. And their prices are nice. Father / Son operation. Good stuff though.
It's a trip, but well worth it. Save up and go large.