I have yet to find a petshop employee who knows a darn thing about fish or the more exotic pets like chinchillas. Even if they claim to be hobbiest, they still might be wrong. I had one girl at petco tell me the reason my bettas were not breeding was because I need to have the male in a tank with 3 females so he can choose which one to breed with
. She said she was a fish breeder. No idea what fish she was breeding but it obviously was not bettas. I hope.
Anyways - the tube plants. Some are Aquatic and some aren't. The Anubias, Amazon sword and wysteria are all aquatic but most of them are not true aquatic plants at all.