Vallisneria spiralis - Corkscrew vallisneria

Origin - tropics and subtropics
Approximate Height : over 20 "
Water Temperature : 15 - 30 C  ( 59 - 86 F )
Hardness : 5 - 12 dCH
pH  6.5 - 7.5
Special Notes : This plant is undemanding and produces runners prolifically.