I wish I could shed some light on this beautiful plant but I can't . I have had it for over a year in a low tech set up( actually with medium light, no ferts, and of course algae!)and it has a mind of its own. Some times it grows and sprouts like crazy and then, find it all but dying away. Kinda like my cryps, had one growing to the top of my 75, then melt to nothing with no apparent change in the tank. When the stem at the base rots all I do is brake that part off and replant . Then hope and pray. I have seen it in a tank with CO2 and it makes a remarkable "shrub".