Hey, i'm just down the road from El dorado. I started a group on Facebook for local hobbyists called Arklatex Aquarium lovers. There is a pet shop in camden, walmart in el dorado sells fish (to my knowledge), and the Eppinette kennal and supply store has fish in el dorado too. Other than that Texarkana is your best bet. I would like to open an aquarium set-up and maintenance business in the next few years, but until then its just a hobby as a stay at home mom. I order plants online, but ordering fish is really expensive.