We recently moved into a new home and our pool is concrete, above ground and comes off the deck. I was walking around the edge that drops off today and noticed the tile underfoot wobbled. I then literally lifted the tile out and was mortified to learn that around 8 tiles were completely loose and I could just lift them off grout and all. The tiles have come off surprisingly clean and with no damage. Do I need a tiler to come and re-grout them or is this something I can do myself? 