I saw something on here once about using window tint on back of the tank for a background. I just wondered if anyone has any information on how well it worked. My 75 will be emptied this weekend, and I thought that might be a good time to move it out where I can get to it and put window tint on the back before I set back up. Probably a black tint, but haven't really thought too much about the color yet. I think it would be cheaper than buying a background kit that is probably basically the same thing.