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Thread: Start up after replaster, sequestrant needed even if water tests negative?

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    Start up after replaster, sequestrant needed even if water tests negative?

    I'm looking at a start up on Wednesday after the mini pebble replaster has been acid washed. I've had my water source (city water) tested for metals and it has come back at zero. My question is it still advisable to use a sequestrant in the start up procedures here- https://npc.memberclicks.net/assets/...nt-rev3.09.pdf

    These are recommendations that I was given to follow by the manufacturer, Stonescapes. On the First Day, Step 6 it says, "Although optional, it is highly recommended to pre-dilute and add a quality sequestering agent...". If I have no metals and it's optional, I would just prefer to not have the additional chemicals in the water. However, if it's found to be a benefit, even without metals detected, then I have no problem adding. Just not sure which way to go on this.

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    Butterfly's Avatar
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    Re: Start up after replaster, sequestrant needed even if water tests negative?

    If it was my pool, I'd add the sequesterant. When we replastered, our pool was filled with municipal water that also tested metal free. However, upon addition of chlorine, pool turned green. I consider the addition of sequestrant insurance.

    We also recommend it in our Plaster Start-up Procedure in Pool School here:
    http://www.troublefreepool.com/conte...w-pool-plaster
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    Butterfly's Avatar
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    Re: Start up after replaster, sequestrant needed even if water tests negative?

    Also, the National Plasterers Council also recommends adding sequestrant.

    http://www.npconline.org/start-up-card
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    JasonLion's Avatar
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    Re: Start up after replaster, sequestrant needed even if water tests negative?

    Sequestrant is good insurance. The odds of metal in the water is low, but if there are metals in the water they can form stains, and staining during the first few days becomes embedded in the plaster and can not be removed. That can be very expensive to fix, so worth a few dollars to avoid even if it is unlikely.
    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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    Re: Start up after replaster, sequestrant needed even if water tests negative?

    Quote Originally Posted by Butterfly View Post
    Also, the National Plasterers Council also recommends adding sequestrant.

    http://www.npconline.org/start-up-card
    As I quoted above, it says optional. Although I see your point.

    But considering the investment made, another 50 bucks is nothing...

    Any recommendations on brand? Was thinking The Pink/Blue Stuff by Jacks Magic

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    JasonLion's Avatar
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    Re: Start up after replaster, sequestrant needed even if water tests negative?

    Jack's The Blue Stuff is excellent for fresh plaster. If you can't find that there are several other good brands, including ProTeam and HTH.
    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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