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The Vallisneria spiralis, or straight Vallisneria, is a freshwater species used as a background plant in aquariums. Straight Vallisneria is a non-floating substrate-rooted aquatic plant that has linear, long leaves with green- or red-hued veins.
While I consider Vallisneria a moderate light plant it does grow and even thrive in low-light settings if given a rich substrate and CO2 supplementation. However, it really does better under moderate plant lights. You’ll also see greener, denser growth with even a little extra light.