Arrgh! Our pool is 17 years old. Today, when they were closing it, I noticed some loose plaster (that was a first) under a row of tile. The tile is lifting up and it looks like I have, at this point, about 8 inches of tile to replace in the spring. Given the winter that's coming, I will triple that. Can this be a "do it yourself" project? It doesn't seem that complicated. I have a half a box of tile left over and I think International Pool Tile has something similar. I did have the spa tile repaired about 3 years ago and it seemed that the grout that he used was like the plaster. I should have paid more attention. Thanks.