Just fish is a pretty good store. I am sad that one of my favorite places to buy plants has closed down. It was the Regency Pet Center off Nicholasville road across from K-Mart. I just moved here last year from Louisville and it closed only months after that
They still have an aquarium service running though.
I have to admit Louisville (and Clarksville, IN) has a great selection of stores.
If anyone is ever in the area you should check out Green tree Pet Center in Clarksville, and there are too many in louisville to name.