Hi, I have some small cracks around the edge of the pool just above the tile (middle pic). What is the best way to patch these areas? Do I use concrete, caulk, or something like that?
Also there are dark stains around the top of the tile pieces (bottom pic). Is there any way to remove this?
Finally I have a piece of rectangle concrete that has broken away from the surrounding pieces (first pic). I can pick it up if I wanted. What holds the blocks in place? Is it concrete or some kind of grout?
I have attached pictures.