Hi all;

I want to build a cube-shaped fish habitat structure using stone or
ceramic tile, the kind that's made of 2" X 2" tiles on mesh backing.
I envision attaching the tile to some kind of backing and filling the
spaces with some kind of grout.

Is this a common practice? What kind of backing (PVC sheet, cement
board)? Are there waterprrod adhesives and grouts that will stand up
to being submerged in water?

Any expertise here?

Thanks a heap,
-Zz