Nice plants.
Sorry if I seem ignorant here, but are these plants part of your aquarium, like a filter, just as Munroco asked?
Would be great if you can provide more about this, as I know very little of this ty[e of planting.
Do yu mind if I ask if how are they planted?
Do you use ferts?
I might be intersted in doing this myself if I can get the info on how this is done.