Anubias nana question

Thanks for the information. And the explanation on what the rhizome is, that helped a lot!

One last question, do I need to trim the roots before attaching it? Or will the existing roots attach?
 
I wouldn't trim the roots, they are pretty slow growing. My big leaved a. barteri sent long straight roots into the substrate rather than attaching to the wood. Only 1 piece of thread (plus the long roots) is holding it now after more than a year. Maybe it moves in the filter return too much to grab on well, I try not to disturb it more than necessary.
 
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