Vallisneria species   Vallisneria spiralis This species grows in any normal aquarium conditions & is the most common of all aquarium plants. It is not exacting to the composition of planting medium or water. If given generous light it propagates quickly & soon fills the aquarium. Description pH range: 6.5-9 Temperature range: 15-30 C Water hardness:  Soft-hard Propagation:: From root runners Habitat: North America Packing Type :  Loose , Bundle , Pot   Vallisneria dubyana Vallisneria Read more