That's a nice nano you have there. You can even see your yashi hovering in the left hand side of the pic.
How many gallons is your nano? How do you like the black sand? I think it looks great in your tank. It helps the colors to stand out more.
Thanks!! It is a JBJ 12DX,
I like the black sand. The first month or so it tends to blow around if a PH hits it but as soon as some crud gets mixed in it packs down quite well.