Here's that update...I got back to replanting this thing tonight. I think that I have a pretty good result. It still looks a bit disheveled, but it should perk up as stuff grows in.
I got a hardscape in there. It's not too special but it adds some dimension anyway. I consider adding some underwater plants. Can anybody think of any smallish bright green crypts that I could use?
Here is another quick update. I switched up the hardscape again, this time electing to use some interesting rocks of different colors that I had sitting around.
There really are fish in there. These phantom tetras are mainly black anyway and they hide in the shadows under the planters.