The planted 150 gallon is in my office and it is about a foot away from the wall so being skinny I can fit in there. LOL! I have seen some wonderful deep blue painted backgrounds. Have black already on the 120 reef tank (came painted). Would the water based latex craft paint run if water splashed on the outside of the tank? Poster board appeals to me also.
Is there a trend you can see? When I first started out 30 years ago we HAD to have the tin foil type background.. OMG!
if it's a constant drip it will thin that area of paint enough that it will start to loose adhesion against the glass and start to lift off, but the occasional drip will not affect the paint at all.