Vallisneria has been a popular choice in the hobby for quite some time due to its minimal care requirements. It can be an excellent choice for beginners because it is very hardy, thrives under low to medium light and spreads quickly by sending out baby plants as runners. When it's well established you can get a new shoot as soon as every 3 days. 

Vallisneria grows very tall in an aquarium and can drape over the top to make fish and fry feel secure. For this reason, it also serves very well as a background plant to provide a nice green back drop for your aquarium.