What is the best technique for properly attaching the standard background to the back of your tank to make it I guess flush and properly attached. Like right now I just have it taped and it looks a bit lame and also the blue won't show at all because of the slight shadow cast by it not being fully attached. On the other hand I don't want to like glue the background to the tank and be stuck with it for life. What are my options? Thanks for the advice and help.