HI guys I was getting started with a 10 gallon nano tank this weekend, I just finished building the stand and was going out to buy some stuff at the LFS. It's going to be planted with hopefully a good aquascape. Inhabitants are going to be 6 galaxy dianos, 4 cories and a dwarf gourami. I have a few questions though. I was going to buy good lights for it, a nice LED light bar that stretches the length of the tank, but what substrate should I buy? I was going to buy some cheap black sand but now I'm thinking I need something with more nutrients? Also are all my inhabitants going to be OK with each other? The galaxy dianos won't pick on the gourami? How should I plant the tank? Thanks a a lot guys.