Okay well lately I have been wondering how to get a background on the inside of the tank, without hurting the fish. I have been looking at a lot of pictures online of tanks, that have backgrounds on the inside of the glass. Which looks so much better, than on the outside to me. I really don't like the reflective look that you get from the glass, even with the background on it. So do the backgrounds you get from petsmart work on both inside and outside? The only problem I can think of with these though if I did is how to get it to stick and also having the exact cut. I've heard that sealing it on the back can give it a really good brightness, but will this still give the mirror look back into the tank? I've read that painting it or spraying it is that it can hurt the paint even with Krylon fusion. So I don't know about that either. Tanks in Petsmart and and petco, I've seen that they have the blue backgrounds that are on the inside and look great. And that's what I want. Maybe somebody on here has worked there and can tell me?