That's looking great--what a cool fish picture.
I can't remember is that Echinodorus quadricostatus? It looks like it. I have some of that and it is my new favorite low-tech plant.
yes, that's a drawf chain sword.
I also have a ludwigia sp. which I found locally floating in the tank. It refuses to be planted. The stem melts and the plant floats away. I might as well stop trying to plant it.