Black stains on ecofinish pool

[antoinedemot]

Hi , I have an Aquabright/ecofinish renovated pool. All in all not a bad experience but still an issue. The Color is white but some areas look dirty, as if those were somehow gripping dirt. Not sure why. Is this a known issue. It does not go away by brushing it off. Would need to dive and use something else I guess. Any hint or advice welcome. Thx

 

[mknauss]

Welcome to the forum.
Can you post some pictures?
Any metal based algaecide or product being used?

 

[Tcadwall0]

Are you using a robot on a fresh finish?

If you can update your signature with all of your pool equipment it would be helpful for others.

 

[antoinedemot]

Are you using a robot on a fresh finish?

If you can update your signature with all of your pool equipment it would be helpful for others.

Am at now but will update when I am back.
Robot was used after the finish but only after a week or so…

 

[antoinedemot]

Welcome to the forum.
Can you post some pictures?
Any metal based algaecide or product being used?

Am away for a few days but will post pictures when back. No fancy product used no. FYI the areas with those dirts are the same as before the new coating was made. Initial Aquabright 4 years ago and some bubbles justified re coating under warranty a few months ago

 

[antoinedemot]

Here are the pics. Thx for your input