Currently setting up a nano planted low tech 16ltr tank. 11w lighting, Flora base substrate, Dosing TPN+, Co2 through tetra optimat kit or Liquid Carbon. Planted with just crypts but what would be more suitable as a carpeting plant Pogostemon Helferi or Marsilea Crenata? Both are on AE for jsut 3.25 a pot so what do you guys reccommend/ have experience with? cheers. N.