Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: What causes this type of staining?

  1. Back To Top    #1

    Join Date
    Jul 2011
    Location
    East coast of central Florida
    Posts
    6

    What causes this type of staining?

    I service a pool on the east coast of Central Florida and the pool bottom has had these types of lines since I started back in December, with no changes over the past season. Chems are always in good range: chl 3-5, pH 7.6 avg, alk 100, ch 250-500, stab 100 (working to bring this down). I saw a worn down pumice stone on the end of a pole a couple of times and wondered if the customers were scraping it on the floor bottom trying to get rid of the marks, perhaps it has contributed??? Here are some pics:

    The marks are around various areas of the pool as well, not just confined to the steps. Could it just be normal wear and tear, use over the past 6-7 years?

    Thanks much.
    Attached Images Attached Images

  2. Back To Top    #2

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: What causes this type of staining?

    The last picture showed it. It appears to be an area that the plaster mix, when applied, was either too dry or had been sitting too long before it was applied or were hit with wind and the wind dried the plaster a bit faster, causing minor shrinkage cracking. They are permanent. They are also harmless normally as long as they don't penetrate. After 7 years, it there were penetration, it would have likely blistered and delaminated. It hasn't so until the finish is redone, they will have to live with it.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  3. Back To Top    #3

    Join Date
    Jul 2011
    Location
    East coast of central Florida
    Posts
    6

    Re: What causes this type of staining?

    Thank you so much Scott.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •