Hey guys, I just finished up tiling a bathroom for a customer and they had a fish tank in the floor. It was about 3'x3' by 12" deep and itw as covered with 1.5' glass and I tiled right up to it. It was unreal. Next week once I grout it I will snap some photos and show everyone. This is ballin all the way. Imagine sitting on your crapper and watching fish swim around your feet.