I have searched and Google is not my friend on this...lol I have one of these plants that has been in tank for months and was doing ok . I decided to move it to a better location today and noticed it has grown a rhizome about an inch long and a bunch of roots . I don't remember the rhizome when I first got it . My question is should the rhizome be buried in the substrate or left above like Anubias ? I have experience with Amazon Swords , but this one is a new one on me .