I had a three pack of green chromis in mine. I will caution that they won't school together in a nano, but they were pretty none the less. The lights really turn them a pretty shade of blue. Also, you could try a chalk basslett. I kept a six line wrasse in mine for a couple of years. Make sure your tank has been set up a while and that you have lots of copes before adding the six line. critters of the rocks are their main diet, although mine would snatch a couple of mysis shrimp every now and then. A yellow watchman goby is good too if you want a little more color. Good luck, nanos are great.
Shannon
