Tile around the edging of the pool.
When coping and tile meet, it's a very nice look.
You can see more of the edge tile around the pool accompanied by the coping.
Many things are tested (leaks, chemical balance, pumps and pressures)... in this case, the water line for the spa is being looked at.
Picuture of the tile to the right of the pool skimmer.
Edge and step tile marking depth change in the pool.
