Here is a Gray scale shot of the background I am building for my 180 gallon tank. Next I have to glue the strips in separately and then grout the entire thing while in the tank.
That's what I was thinking about. Thought it would be more than just several though.
What type of grout? Some of the tile grouts have bonders and sealers or latex in them and some are even epoxy grout. Or are you referring to the non shrink type used in construction?