Looks to be a Blue Gudgeon Dartfish. Hard to tell though.Exceptional tanks everyone! Wow!
Speedykeys, what type of fish is that in the top-center of your tank shot?
Here are a few pics of my Nano. Try to ignore the coraline all over the glass. I have since cleaned the front and sides. I dont have any of the 55. I need to get some of the 55 because I have a nice new carpet anemone that needs to be shown off.