Hi All, our new inground plaster pool has been filled for approximately 5 weeks. About 2 weeks ago I noticed white scale in some of the grout joints around the spa. I was able to clean most of them off with my fingernail. Now they are much worse. There are 4 large ones and a few very small ones. They start a few inches above the water line. I have trouble getting any answers from our PB. Chemistry has been monitored and maintained but it doesn’t seem like it’s a water issue as it is above the water. Anyone have any idea what it is and how it can be removed?
Scale seeping from grout
- Thread starter Chfrey3
- Start date
That's called efflorescence and is caused by water getting behind the tiles and pushing out the minerals in the grout. Some wall applications the PB will put a water proof liner under.
Try to use a dilute muriatic acid solution (like 1 part water to 3 parts water) and a gentle brush to see if that will remove it.
Maddie
Try to use a dilute muriatic acid solution (like 1 part water to 3 parts water) and a gentle brush to see if that will remove it.
Maddie