We installed a new pebble finish and it is now turning white in about 50% of the area. We had metal staining on our plaster about two years ago after installing a SWG. We turned it off and installed the new finish only to have the white stains appear and we have not turned on the SWG yet.
We tested the water for metal and added Jacks Black magic. We also tried Jack's Black Magic stain removal #2 and no change. Finally an unusual thing happened as we got a white powdery substance in the spa. It wasn't from the stain, because the stain remained. This has never happened before and our PB is testing the material. It was like the was something in the pipes that cause this. Has anyone seen this before?