New pool startup - sunshelf stained from water jet?

[zp91hbk]

My newly plastered pool seems to be stained on the sunshelf from the water jets. It was filled by a pool truck the same day the pool was plastered. Start up of the equipment was done the following day.

I’ve followed all protocol, but I cannot understand how the shelf would be stained from a jet. I cannot find one picture of something similar online. Anyone have this experience before? This is 7 days in from plastering. It appeared the 3rd day.

 

[ajw22]

It is cosmetic. Go through your plaster startup process for the first 28 days. If that are still bothers you then sand the area with 80/100 grit wet/dry sandpaper or a diamond sanding pad and see what color is under it.