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Thread: Refill after acid wash

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    Join Date
    Jul 2014
    Location
    Escondido California
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    2

    Refill after acid wash

    I recently drained and acid washed my 12 year old pool. After refilling the pool with our well water I had it tested at the pool store. The test results below.

    FAC 0
    TAC 0
    PH 7.7
    CYA 0
    TDS 200
    Phosphates 0

    The pool store recommended shocking the pool, adding conditioner and following up with Chlor Brite. After adding the chemicals my pool turned green. I remember when we first filled the pool 12 years ago the pool turned green and someone recommended we use a product to get the metals out. I plan to go buy Metal Free tomorrow and a good test kit. Just wondering if I am on the right track. I also plan to switch to liquid chlorine after reading through the info on this site. Thank you!
    30,000 gal Pebble Tec, spa with waterfall, Pentair 2000 series DE filter

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Refill after acid wash

    Welcome to TFP!

    Shocking the pool on startup is not required. Still, Chlor Brite is a reasonable way to start since it will add both chlorine and CYA, both of which you need at the moment. However, you have to keep an eye on the PH when using Chlor Brite as it is very acidic. You also don't want to continue using it very long, because it will raise the CYA level very very quickly, and you don't want CYA getting too high.

    The green color is almost certainly from iron in the water. I don't recommend using Metal Free, which is decidedly not one of the sequestrants we recommend using. Sequestrants based on HEDP, phosphonic acid, or phosphonic acid derivatives are the most effective. ProTeam's Metal Magic and Jack's Magic The Pink Stuff (regular), The Blue Stuff (fresh plaster), and The Purple Stuff (salt) are some of the top sequestrants. You can also find many other brands with similar active ingredients, some of which are noticeably less expensive.
    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

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    Join Date
    Jul 2014
    Location
    Escondido California
    Posts
    2

    Re: Refill after acid wash

    Thank you. I will try the recommended sequestrant and see if the green clears up. The pool looked beautiful until I added chemicals. I appreciate your help and the info on this site.
    30,000 gal Pebble Tec, spa with waterfall, Pentair 2000 series DE filter

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    37,389

    Re: Refill after acid wash

    Welcome to TFP!

    Also realise that the recommended test kits are rarely available locally and usually need to be ordered. I recommend the TF-100 as the best value.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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