Amazon Sword Plant
The Amazon Sword is a tough leaved plant that is very durable and adaptable to a wide range of conditions. Amazon Swords are most often planted along the back of an aquarium as a backdrop to cover heaters, filters, wires and air lines. They can pretty easily get a foot tall and up to 20 inches or so when very happy. This is an easy plant to maintain. They can be planted in gravel (though a plant substrate will work better in the long run).