35k gallon, inground pool, in northwest PA; built in 1992
The 6"x6" tile runs into the skimmer area and adjacent to the plastic skimmer box. The seam between the tile and skimmer box had degraded years ago, and it'd been repaired with some sort of putty/epoxy. One of those repairs recently fell off (the right side, in the photo below), and the water level drops quickly to below that level (and then stops dropping) unless I add water every other day (which I've stopped doing). The rate of loss is significantly higher than typical evaporation, the rate of which I've developed a strong sense over the years. This new rate of water loss is definitely from the patch falling off.
It's been awhile since I've done a repair like this, so I'm checking in to see if there are any new solutions (or perhaps we shouldn't have used the putty/epoxy that we tried last time).
Is there a "best practice" for sealing b/t the tile and skimmer box?

The 6"x6" tile runs into the skimmer area and adjacent to the plastic skimmer box. The seam between the tile and skimmer box had degraded years ago, and it'd been repaired with some sort of putty/epoxy. One of those repairs recently fell off (the right side, in the photo below), and the water level drops quickly to below that level (and then stops dropping) unless I add water every other day (which I've stopped doing). The rate of loss is significantly higher than typical evaporation, the rate of which I've developed a strong sense over the years. This new rate of water loss is definitely from the patch falling off.
It's been awhile since I've done a repair like this, so I'm checking in to see if there are any new solutions (or perhaps we shouldn't have used the putty/epoxy that we tried last time).
Is there a "best practice" for sealing b/t the tile and skimmer box?
