Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Plaster Surface Issues (With Pics)

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    Tampa/FL
    Posts
    13

    Plaster Surface Issues (With Pics)

    Hello,

    Purchased a house last September, and I have been taking care of the pool since we bought the house. I have been through pool school on this site, and I thought my levels are generally good. I've noticed that the plaster is starting to get "rough spots" in certain areas, and I'd like to know why. It seems to be progressively getting worse (More affected areas). I will say that some of it was there when we moved in.
    Attached Images Attached Images
    12,000 IG Marcite, Manually Chlorinated
    Pentair Warrior Cartridge
    Century 1 HP Pump

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Plaster Surface Issues (With Pics)



    Also are the areas in your opinion spots of erosion (lower than the rest of the surface) or scale (higher than the rest of the surface)? To me it looks like erosion.

    Picture 1: Base of step riser and back of step tread in shallow end?
    Picture 2: Location? Wall? Floor? Near any feature like skimmer or return?
    Picture 3: Assuming a floor drain? or wall drain?
    Are any of them in an attached spa area or just in the pool?
    What type of automatic cleaner do you use if any?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  3. Back To Top    #3

    Join Date
    Jul 2015
    Location
    Tampa/FL
    Posts
    13

    Re: Plaster Surface Issues (With Pics)

    From this morning:

    FC: 7 ppm
    CC: 0
    CH: 325
    TA: 90
    CYA: 50

    Most seem to be areas of erosion. There is quite a bit in the shallow end that's just on the pool floor. I've attached a rough drawing of where these sections are located in red. We don't have a spa or use an automatic cleaner. I just use a brush. Also, not pictured is the skimmer which is to the right of the steps.

    I guess my main concern is the number of affected areas seems to be appearing rapidly (in the last year)

    Thanks for your help!
    Attached Images Attached Images
    12,000 IG Marcite, Manually Chlorinated
    Pentair Warrior Cartridge
    Century 1 HP Pump

  4. Back To Top    #4
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Plaster Surface Issues (With Pics)

    Your numbers don't seem to indicate a problem with corrosion or scaling even over a wide range of pH (7-8.2). Are you having to add acid to the pool to combat pH rise at all? Are you adding the acid very slowly and brushing the pool after adding? Are you manually chlorinating with bleach or a SWG?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  5. Back To Top    #5

    Join Date
    Jul 2015
    Location
    Tampa/FL
    Posts
    13

    Re: Plaster Surface Issues (With Pics)

    Quote Originally Posted by JVTrain View Post
    Your numbers don't seem to indicate a problem with corrosion or scaling even over a wide range of pH (7-8.2). Are you having to add acid to the pool to combat pH rise at all? Are you adding the acid very slowly and brushing the pool after adding? Are you manually chlorinating with bleach or a SWG?
    Recently, we have had some rain, so I really haven't added any acid to the pool. I when I do, I try to add the acid in small increments, in the deep end. I guess it's possible I have brushed after adding acid. I'm manually clorinating with this stuff: Shop Kem-Tek 1-Gallon Liquid Pool Chlorine at Lowes.com Probably three months ago I noticed my CH was lower than it should be (so not by a lot) and have added Calcium Chloride to bring it up some. Father-in-law has a pool and bought us a bunch of the "pucks" when we moved in. I don't really care for them, because they are expensive, but we have bunch so we are using them up.
    12,000 IG Marcite, Manually Chlorinated
    Pentair Warrior Cartridge
    Century 1 HP Pump

Posting Permissions

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