The plants in the clump are miniature baby tears. The tall plants on the left are Rotala Indica.
I still haven't quite decided how I am going to finish planting it. I was originally going to do a fairly heavy planting, but now I kind of like the more open feel and room for the fish to school. Still looking for some plants that might have a chance to flower in this type of setup or that have a water lily appearance. I have tried a green and now a red tiger lotus, but neither of them have done very well for some reason - but at least the duckweed is happy.