I don't know what sort of tubes you guys are talking about? xD Pic? At my petco they just have a tank with a bunch of plants submerged. The plants are in little baskets with 'rock wool' or something?
I bought an amazon sword and a water primrose. Kind of pricey mehhh. The water primrose started dying right away. I threw it out. Too fragile -_- The amazon sword is doing okay, though. I really should have done more research into plants before buying them. I'm pretty sure the lighting in my tank does not have the correct voltage for high-light plants. I was too lazy to do a search on my phone. I bought the ones that looked pretty D: Don't do that, definitely do research and list plants you want to buy, then go to the store and see if they have.