OOOOOOOOOOOOOOOOOOOOHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
That brings back memmories. I have had this plant before. In my golden years(look at me talking about my golden years and i am only 17) of guppy keeping this plant was perfect for hidding babies. Its a form of hygrophilia. That stuff grows like crazy. Very profitable. Clip the stem at an angle to replant. Within a month you will have two very healthy green hygro's