As some may be aware, I will be setting up a new 90 today to house my RD. I will use PFS mixed with balck sand as the substrate and decorate with some drift wood and rocks. I'm also planning on 110 watts CP either 10,000K or 6,700K on top. My question is, what color background do you think would be the best to get the most out of his color? I have a background that is black on one side and dark blue at the bottom to a lighter blue gradation towards the top on the reverse.