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    Black Algae??

    Thanks, I don't know if I can get enough on my finger to transport but try it. I will have to wait a few days for it to build up enough to give it a try. If it is not algae any ideas on what it could be? Those are cracks. They have been there since the pool was built 1.5 years ago. The...
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    Black Algae??

    I am hoping for some help in determining if this is black algae or something else? I have been dealing with this issue for a few months now. These black stains began appearing around a few of my pool returns. It is not all, just 2-3. When you rub your hand over the black spots some of the...
  3. Black Algae?.jpg

    Black Algae?.jpg

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    New pool walls produce clouds when rubbed

    I have a new pool (120 days). every time you rub the walls a very small white cloud of smoke comes off into the water. The pool walls feel a bit slimy and slick but water is clear and the chemistry has been good since opening. Even with running the chlorine high this is still occurring every...