In 1.5 to 3.2 WPG with no CO2 or Excel in 5 different tanks, I am growing hygrophila (Angustifolia, Corymbosa, Difformis), Ludwigia (Cuba, Repens), rotala (indica, vietnam), Mermaid Weed, Purple Cabomba, Limnophila (Aromatica, Aquatica), Echinodorus Bolivianus, Java Fern, XMas Moss, Anubias Nana, Bacopa Caroliniana and several types of Crypts.