I have never kept a live plant in my aquarium but I really like the look of plants such as Red Root Floaters/water lettuce. I would like something that is: -Very easy to care for. Please list their needs. -Will absorb a lot of nitrates. -Where can I find it? I prefer pet stores ad its easier for me. As I said, I really like Red Root Floaters but I don't know their needs or where to get them. Thank you!