I am just in the picking out materials phase of my pool project . Dig date is in July . I am going for a very modern look and LOVE the look of glass tile for the waterline either from NPT or Master Tile . Is glass going to be problematic? Would be grateful for feedback and to hear from anyone who used the glass tile at the waterline . For my plaster I will be using stonescape with added glass beads /abalone shell in either Midnight Blue or Tropical Blue .