On Tropica's website it says that although Lilaeopis is a slow grower, "the emergent culture of brasiliensis is especially well suited for paludariua where it builds a thick carpet within a few weeks." I'm not sure which variety I have, but I'd sure like to have a thick carpet of it a few weeks from now. Hmmm... If I potted some of it outside the tank... Any thoughts? Ken Cova