Relatively new pool owner and need help assessing my situation. First, the stats:
FC = 4
TC = 4
pH = 7.4
TA = 70
CH = 300
CYA = 60
Just had my IG pool replastered in white as part of a very long, frustrating renovation process (poor contractor). After the replaster work, the contractor became completely unresponsive, so I was left on my own, but managed to follow all the research/advice I could gather here and elsewhere about the start up process (twice daily brushing, no salt for 30 days, minimal chlorine via floaters, kept pH in check).
All looked good until about 6 weeks post replaster, when these “stains” started to appear, and now cover a number of areas, most apparent in the deep end, especially where the walls meet the floor, although lighter versions can be seen on the floor elsewhere (most visible on cloudy days, in the shade). No amount of brushing, even with a wire brush, has an effect. Surface is smooth.
So, is this much discussed mottling or something else? While I might accept some of the lighter variations as normal mottling, the darker, more pronounced areas seem like something I've never seen in a white plaster job and not normal. It looks a little like dirt, but does scrub or bleach out. Again, the contractor won't return my multiple calls and his business number is now disconnected. I have no hope that I'll get any resolution with him, so reaching out to you guys for support.
I look forward to your thoughts and advice...