Skimmers
Skimmer Weir Doors
Skimmer Crack Repairs
Skimmer cracks are generally the result of settling/movement around and underneath. Ideally it's best to dig up the area, replace any bad items, and re-pack to prevent further movement. It can be worthwhile trying to fix a skimmer crack with epoxy and seeing if it holds.
Repair products members have used include[1]: