Review on Coavas Blackout Window Film No Glue 100% Light Blocking For Day Sleep, Privacy Static Cling For Home Security And Aquarium, Frosted Black 35.6 X 118 Inches by Richie Jacobson

This makes a perfect black background for an aquarium, allowing you to focus on what's in the tank rather than what's behind it (either wires/filters, or a distracting printed background). Using this film rather than a pre-cut aquarium background requires a little labor to cut and apply it, but it's much cheaper, and gives a very finished look with no tape around the edges and no moiré effect of plastic pressed up against glass. The instructions aren't kidding when they say to use A LOT of water to install - surfaces need to be thoroughly wet, or you will get lots of bubbles. Thankfully installation is pretty forgiving - it is easy to peel back a bubbly section, spray more water, and try again. Do not attempt installation without a spray bottle.