Because of the nature of a pool environment, calcium build up accumulates on pool tile, especially in low areas that consistently collect water. The term used to describe this is “efflorescence”: Minor Efflorescence Depending on the severity of mineral build up on the tile surface, a regular quarterly or semi annual cleaning of the tile with a mild acid based cleaner will remove the white mineral deposits. Severe Cases of Efflorescence In some cases, the mineral buildup has gotten so severe that it becomes hardened and browned on the surface of the tile. This type of efflorescence is very difficult to remove and requires much stronger acid applications to remove the buildup on the surface. A restorative and intensive cleaning process can be used and we can provide a cost to you on restoring your pool tile. Maintaining Your Pool Tile in Between Visits Any method of dry mopping remaining water and a routine hosing down of the pool tile will help reduce the settling of mineral deposits. Have your pool tile cleaned regularly by a trained professional at minimum twice per year, ideally once per quarter.