its one of the easier plants to grow emersed. use the amazonia, and have just enough water keep the surface wet, once the emersed leaves grow, you can grow it in a pot sitting in a tray of water on the window sill. mine grow with no care in clay pots with only the bottom inch or so in water (my outdoor water gardens in my case). you would only need a cover to maintain humiditiy if your ambient is on the low end, 45%RH or less. otherwise its pretty tough.