There are a number of stem plants that do this. I've found no harm in trimming the new roots off if you don't like the look of them. I've also noticed that aquariums with higher levels of lighting tend to have less superfluous root growth. I've not seen in writing that this is a cause and effect scenario, but it's soemthing I've noticed in observing numerous tanks. Especially with Elodea requiring fairly high levels of light to thrive and root properly, the lighting on your aquarium may be a contributing factor to this growth.
|