I need some help with my plain gray colored plaster.
Here are some links showing a light discolored area that appears to "flow" from shallow end to deep end. Also, there appears to be a round sort of pooling area in the deep end.
This pool was finished last November.
I have also included a picture of some stains on the plaster where they dropped sealer. This is around all of the pool, some of it is just dark areas, some has chalked up like bird poop.