Hi, and welcome to the Frog Forum!
I'd love to see some photo's of your tank. Also, we've a whole section dedicated to FBT's, as well as countless experienced keepers of them, such as Bombina Bob
Yeah, like Bob said, never trust Pet stores. Typically, the workers there don't know much, if anything, about the animals they are selling. Even if they seem like they do, research first.
If you have any problems, concerns, and questions, feel free to ask!