Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: Pristine Blue to Chlorine

  1. Back To Top    #1
    RaviePoolGirl's Avatar
    Join Date
    Nov 2011
    Location
    Napa, CA
    Posts
    47

    Pristine Blue to Chlorine

    This post is for my Mother's Pool. I found out from her that last season she used Pristine Blue instead of chlorine for a cheeper alternative. After much reading and educating her that Pristine Blue is not a sanitizer, but just an algicide, she will be making the switch back.

    I wouldn't think she would need to drain any of the water for removal of Pristine Blue, just start BBB method as backwashing will slowly reduce the level that may be present. I already have her onto a good test kit TF100.

    I am more curious if she may encounter cloudy water as she begins chlorine sanitation again, considering that last season she has had many bathers and I am sure a buildup of organics that will still be lurking. She is still winterized and has not opened as she is in Michigan. She has an 19,000 gal round AGP.

    Any experience with this? I just want to give her an idea of what she may expect.
    20,000 gal inground hourglass shape with 7' Hot Tub with overflow; Gunite
    Hayward TriStar 1.85/.22 THP - Hayward cartrige filter- SWG.
    Hayward Gas Heater

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pristine Blue to Chlorine

    The main thing is to test the copper level and either insure that it is below 0.3 or use sequestrant. Copper levels of 0.3 or higher can form very difficult to remove stains when chlorine is added unless you are using sequestrant.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: Pristine Blue to Chlorine

    At least it's an AGP pool so I presume has a vinyl liner. Plaster pools get stained more easily. Also, if you find that the copper level is higher than Jason mentioned, not only use a metal sequestrant, but also try and keep the pH from getting too high. It is the combination of higher metal ion concentrations and higher pH that causes metal staining though extremes of either can also cause a problem. For copper, it's not the chlorine itself that is the issue, but the fact that the pH rises when adding a hypochlorite source of chlorine and that in a pool with CYA in it such rise is even higher. The use of 50 ppm Borates helps to minimize that rise in pH if you find this is a problem.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  4. Back To Top    #4
    RaviePoolGirl's Avatar
    Join Date
    Nov 2011
    Location
    Napa, CA
    Posts
    47

    Re: Pristine Blue to Chlorine

    Yes it is a vinyl lined pool.

    If a sequestrant is used to bind any copper present, can it be tested for?
    20,000 gal inground hourglass shape with 7' Hot Tub with overflow; Gunite
    Hayward TriStar 1.85/.22 THP - Hayward cartrige filter- SWG.
    Hayward Gas Heater

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pristine Blue to Chlorine

    Yes in most cases, most of the copper tests still work correctly when there is sequestrant in the water.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  6. Back To Top    #6
    RaviePoolGirl's Avatar
    Join Date
    Nov 2011
    Location
    Napa, CA
    Posts
    47

    Re: Pristine Blue to Chlorine

    So then, if it is necessary to add a sequestrant, she will add it based on the size of her pool (obviously). Can we assume that added correctly, all the copper will be bound until it is removed from the pool by backwashing?

    Thanks,
    Bobbie
    20,000 gal inground hourglass shape with 7' Hot Tub with overflow; Gunite
    Hayward TriStar 1.85/.22 THP - Hayward cartrige filter- SWG.
    Hayward Gas Heater

  7. Back To Top    #7
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pristine Blue to Chlorine

    The challenge is that sequestrant breaks down slowly over time, so you need to constantly (usually weekly) be adding more. Other than that, you are correct.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, 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
  •