So this summers fun is the white line that appears around the water line after swimming. It seems to heavily concentrate on the mortar around the tile just above the water line. It appears after the pool is used, and the more splashing, the worse it gets. The amazing thing is that it disappears the next morning. I do have an issue with constantly rising ph, but I keep it in check.
Anyone know what this is? Does calcium disappear over night?
I have grey mortar so it really shows.