That's quite a nice aquascape; a group of pencilfish to keep your pandas company will do well I would expect.
One can never have too many plants...well, I suppose maybe, but...
For a good floating plant in this type of setup (with pencils) see if you can find Ceratopteris (Indian Fern, Water Sprite are a couple of common names). It grows very well and very fast in soft acidic water but others have had success adapting it to more basic water. The dangling roots are favourite haunts of pencilfish for browsing and spawning. You can see it in the photos of my 70g, floating. It sometimes takes a while adjusting to a new (different) tank, but once it does, it will grow. I chuck out daughter plants (they form on the leaves by the dozens) every other week or it would choke the surface of my aquarium.
Some pygmy chain swords at the bottom would be nice, they send out runners and produce daughter plants every 2-3 inches once established, and would cover the bottom in a few months (you can always trim out the plants to keep parts open for the corys to feed). I also have this in both tanks, the lighter green short plant spreading across the substrate. It grows about 3-5 inches high depending upon intensity of light (with less intense light it grows taller with thinner leaves, more intense light it grows shorter with more and slightly wider leaves).
If you can't find either locally, I can mail you some (did this for another member a while back and they arrived fine and are growing well he says) for the cost of the postage. But have a good hunt locally, because local stores will have them in your type of water (which is bound to be quite different from mine that is very soft and acidic) so they will adapt a bit easier.