I have had my Amzon Sword for over a year now in a 10 gallon tank. It is doing very well. I generally clip a couple of leaves off every so often to keep it from taking over. Lately I didn't do that and now it has thrown up a stem to the surface and that stem has begun to sprout a new plant with leaves and a roots. What shoudl I do, clip it off or leave it? Does this mean the main plant will die soon?