Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 17 of 17

Thread: White line appears after swimming

  1. Back To Top    #1

    White line appears after swimming

    Greetings,

    So this summers fun is the white line that appears around the water line after swimming. It seems to heavily concentrate on the mortar around the tile just above the water line. It appears after the pool is used, and the more splashing, the worse it gets. The amazing thing is that it disappears the next morning. I do have an issue with constantly rising ph, but I keep it in check.

    Anyone know what this is? Does calcium disappear over night?

    I have grey mortar so it really shows.

    Any help!
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  2. Back To Top    #2
    Guest

    Re: White line appears after swimming

    Post a full set of numbers so we can determine your pool water chemistry

  3. Back To Top    #3

    Re: White line appears after swimming

    Ph 7.9
    Fc: 3
    Cya 40
    Ta 70

    CH 200

    That's all I got
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  4. Back To Top    #4
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: White line appears after swimming

    Your PH is too high.

    Do you use an algaecide?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  5. Back To Top    #5

    Re: White line appears after swimming

    Nope, no algecide. Just acid, some chlorine. Pool is pretty Chem free
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  6. Back To Top    #6

    Re: White line appears after swimming

    Ph is a constant battle, always has been. I do have a spill way out if the jacuzzi, but can't turn it off as it is part of the filter circulation.
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  7. Back To Top    #7

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: White line appears after swimming

    I'd lower your pH to around 7.4. I'd also get your FC up a bit. You are at the bare minimum.

    Unless the white line is caused by a product that has been applied to the skin prior to swimming, I'm not sure what it could be.

  8. Back To Top    #8
    Guest

    Re: White line appears after swimming

    I get it in my spa more often then my pool (Probably cause of the heat). When I lower my PH to 7.2, it goes away.

  9. Back To Top    #9

    Re: White line appears after swimming

    Ok, i have real trouble keeping the ph down. I have to pour a gallon of acid in everyday.

    Could it be effeflourence(sp?)
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  10. Back To Top    #10

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: White line appears after swimming

    have to pour a gallon of acid in everyday.
    Well, in a pool your size, and assuming your pH is 8.0 when you decide to add the gallon, that would mean your pH must be getting down into the low 6's each day. Is that correct?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  11. Back To Top    #11

    Re: White line appears after swimming

    No, it drops to 7.3-7.5 range. And then shoots back up to 8 in 24 hours
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  12. Back To Top    #12
    Melt In The Sun's Avatar
    Join Date
    Oct 2009
    Location
    Tucson, AZ
    Posts
    3,899

    Re: White line appears after swimming

    How are you testing? That seems impossible without sky-high TA.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
    Make each day your masterpiece. - John Wooden

  13. Back To Top    #13

    Re: White line appears after swimming

    Tf 50 kit, my ta was high earlier this summer. Do you think it could have something to do with the ozone bubbles that come out if jets?
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  14. Back To Top    #14

    Re: White line appears after swimming

    I am gonna retest and get back with more details. Thanks
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  15. Back To Top    #15
    dmanb2b's Avatar
    Join Date
    Apr 2009
    Location
    NY
    Posts
    3,728

    Re: White line appears after swimming

    what strength MA are you adding when you pour in a gallon at a time? Even at 20k gallons, that's a lot of MA to dump in the pool at once.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  16. Back To Top    #16

    Join Date
    Jul 2009
    Location
    Seattle
    Posts
    87

    Re: White line appears after swimming

    How old is your plaster?
    20,000 Gallon kidney sort of a sand filtered gunite in ground pool w/ hot tub.

  17. Back To Top    #17

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: White line appears after swimming

    Hello-o-o-o, Sausage!! Are you out there?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

Posting Permissions

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