I love how your tank looks as of the 11/14 changes, those first two pictures looked much less natural. I went with all drift wood so when I do see slate and rock I like it. I just helped my sister redo her 125 which was too big to move and paint the back, so we hung black wrapping paper on the back of her tank and it looked fantasic ... think about trying something similar. Your tank is too beautiful not to have a background. Good luck with everything!