I noticed some staining in the plaster as the pool was filling, after 5 days the stains have not gotten better, worse I believe. The images below are admittedly bad, I need to take it during the day but I'm rarely at home in time to catch it. That said, I'm sure you can see what I am talking about. The pool is still being maintained by the pool builder.
My Pool builder has told me that brushing will fix it but that's not the case so far... What do you guys think?
The below is in another section of the pool, I believe it was cased by some bark that was jammed in the return.