Acrylic hobby paint from Michaels has no fumes and will work on an acrylic surface.
Acrylic hobby paint from Michaels has no fumes and will work on an acrylic surface.
What I've always done, is spray paint a styrofoam panel the size of the back wall with matte black, and tape it to the back.
In that way, if at some point the front panel gets scratched up, I can just turn the tank around and use the unscratched side for viewing.
The styrofoam gives a extra little protection for the back side, and in the case of of a power outage, with glass adds some extra insulation when power goes out, I'd often tape styrofoam to the end panels for extra insulation, and cut a piece for the front, just in case.
This is definitely a good option that I have not considered. It makes it easier if I want to change things in the future.
i would probably never paint the back of my aquariums, in case you want to make it like a center piece or something someday