Ollo & welcome. I was just in Knoxville this spring. They had a rockin lfs there. I can't remember the name of it. But I wish we had something like that around here. So far I don't know of any like that one. But we have Marine Solutions. There is a place in Troy I like. Most important are the local reefaholics scattered about central Ohio.
Do you remember which part of town? 2 of them are very close to one another - The Coral Reef deals only with saltwater (fish, corals, live rock, dry goods) and the other, Aquarium Connection, is a larger store that has everything from saltwater fish/inverts to corals, freshwater fish and plants, live rock, dry rock, tanks, filtration, and a large outdoor area dedicated to ponds. Both stores are great. Very nice and clean and good selection.