Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: plaster surface

  1. Back To Top    #1

    plaster surface

    mixed cyanuric acid with water in a bucket swirled it for few minutes before pouring it in the pool . ran the pump for 8 hours before turning it off . in the morning there was discoloration on the plaster where the acid was . wandering if there is any remedy for plaster surface

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,345

    Re: plaster surface

    Were you using liquid or granular CYA?
    If it was granular, was it completely dissolved or were there granules left sitting on the bottom?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Re: plaster surface

    there were granulars left not completly dissooved

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: plaster surface

    Describe the stains, or better yet, post a picture. I'm visualizing white freckles against the pale blue-grey plaster. That's what I had. Turns out the white is the plaster, the other color was calcium scale, a nice, uniform coating.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,345

    Re: plaster surface

    CYA is a mild acid and usually not an issue unless left laying on a surface. If you're lucky it will be scale as Richard says and keeping your FC at the top of the recommended level for your CYA for a while it'll fade and become uniform again. Even if it's not scale it will become more even over time, it just takes a lot longer.

    We recommend adding CYA to a sock in front of a running return or putting it in a skimmer and running the pump till it's dissolved.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

    Re: plaster surface

    Thank u for the responses , with understandig of the issue it already feels better . It is the scale and i can see by time it becomes right again.
    Thank u

Posting Permissions

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