Nothing much, but now that things are up to par, I added a bunch more of the Black Skirt Tetras & an entire school of Neon Tetras. Both Tetra types are your everyday variety fish, they stay small and are all friendly. So nothing fancy but just added to the environment. All told there are:

10 Neon Tetras
9 Black Skirt Tetras
2 Pygmy Corydora Catfish
5 Striped Kuhli Loaches
2 Nerite Snails & ??? babies