I have a customer that has asked to remove this staining. This is just one of many spots, about 25 in total. One area at each sprinkler head, it seems much worse in some locations and almost nothing at others. The picture would be one of the worst ones.
When I tried to scratch it with my fingernail nothing happens, it seems rock hard almost the same texture as the brick itself. This is on city water.
My guess is calcium from the water, but i am not totally sure. Any ideas on how to treat this, and approximately the time.
When I tried to scratch it with my fingernail nothing happens, it seems rock hard almost the same texture as the brick itself. This is on city water.
My guess is calcium from the water, but i am not totally sure. Any ideas on how to treat this, and approximately the time.