Moved from here.
I feel you’re pain, i have a similar issue, but different. New pool completed 8/10/22. Between tiles and on some tiles in patchy areas looks to be black grout. Looks dirty but but not dirt. It looks to be dried on grout that was not wiped off? If anyone can pinpoint what the heck this is that would be great. This is in patchy spots all over the tile.
I feel you’re pain, i have a similar issue, but different. New pool completed 8/10/22. Between tiles and on some tiles in patchy areas looks to be black grout. Looks dirty but but not dirt. It looks to be dried on grout that was not wiped off? If anyone can pinpoint what the heck this is that would be great. This is in patchy spots all over the tile.
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