I had a 180g with a blue background and now I have 325g black background tank and I sooo...... miss my blue background! Seems as if the fish are now trying to blend into the black so their colors don't pop as much. When the tryed to blend into the blue thier colors looked great especialy the blue tones looked intense. I have trouble seeing my long spine urchin on the black he blends right in. It looked awsome on the blue. The blue was also more reflective so the tank was brighter. I know the black is more modern look but far from natural. When I have been diving in mexico/Jamica on the reefs and it's bright blue you see in the distance. Just figured I'd add my two cents to this thread. Gary
I like black, and dark blue, The light blue on a large tank I think it kinda makes it look like a swimming pool. I think the METALLICA poster is a good choice, would look weird covered in coraline tho.