Hey Im in Rockwall and I had the same problem. But here are a few.
Fish Gallery
6955 Greenville Ave
Dallas Tx ..................... Tom knows just about anything about freshwater and planted tanks.
Dallas North Aquarium just suffered a massive fire and lost all their products and alot of fish. I didnt like the place for purchasing fish and their prices are high, but they have what you need and I only will deal with Cole, only there on weekends.
This is my new favorite place. Aquatic trading
4750 N. Jupiter rd. Garland Tx. The owners name is Tony, really great guy and he is the owner. You get I think 15% off of your first fish purchase. He has a Jardini there and some large arowanas. Ther is a great selection of saltwater fish also. There are alot of really nice fish there. I would only buy fish from him now in this area. PM me if you have any more questions or want more detailed info on the shops. When I moved here in September I went on a hunt for good fish stores and this is all that i would deal with. Stay away from that Boutique Pet store, what a joke!