I was trying to remember the name of a particular schooling fish yesterday and it finally came to me- A Roseline Shark...GORGEOUS! Not sure about a 20 gal tank though....
those roseline sharks are pretty but the website I found said adult size of 6'' so thats a little big. What do you think about either placing the driftwood on the bottom of the tank or leaving it where it is and put some plants around and underneath it.
Drag about the roseline sharks...Incredible in a planted tank...Perhaps for the next tank???
You have a very formal layout, so throwing something in willy nilly looks really odd...I think it is more the shape of the driftwood that I dont like...Perhaps a "chunkier" piece for the middle with some plants around it??? Or maybe lay the wood down and plant in around it to tie it in better....It just looks like it is stuck out in space....