get or make something to shim it. If your shim is the length of your over flow there is no way it could fall
I had some in with yellow labs, it was fine. and a nice contrast of color
I've had an oil on canvas painting above my 75g for years with an open back and bio wheels spinning away and there are no humidity issues. I would put
I don't think I'd like a USB powered light for my tanks, but if you can cut this to length it would work pretty good if it's water proof or resistant.
What do you guys think of this for moon lighting?