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Thread: Borate levels that won't go down!

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    Borate levels that won't go down!

    For some unknown reason the Borate levels in my pool will not go down! The levels are currently at 90! For weeks I've been running my pump 24/7 & backwashing 3 times a week. I drain the pool down to the minimum line on the skimmer, fill it back up & let it circulate for 3 days & then do it all over again, but the levels will not drop! The Pool Calculator states I need to drain 31% of the water and refill.

    Any thoughts as to why the levels will not go down?

    Also is there any danger to people or equipment with it being so high?

    Thank you!!!
    Type: Doughboy 16x32 Oval Above Ground w/ 7' Deep End
    Volume: 17,500 gallons
    Chemicals:SoftSwim, Borax & Acid
    Testing Method: Colorq Biguanide Pool/Spa 5
    TA:135
    Ph:7.9
    Biguanide (SoftSwim B):35ppm
    Biguanide Shock (SoftSwim C): 49ppm
    Borate: 90ppm

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    Butterfly's Avatar
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    May 2007
    Location
    South Carolina
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    Re: Borate levels that won't go down!

    Did you add enough to reach 90?

    What are you using for testing?
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    Re: Borate levels that won't go down!

    Yes, I added way to much when I did it for the 1st time back in May.

    I use Aqua Check Borate test strips, which max out at 80. I got the 90 number from a computer analysis done at the pool place yesterday. It showed the Optimizer level of 90.
    Type: Doughboy 16x32 Oval Above Ground w/ 7' Deep End
    Volume: 17,500 gallons
    Chemicals:SoftSwim, Borax & Acid
    Testing Method: Colorq Biguanide Pool/Spa 5
    TA:135
    Ph:7.9
    Biguanide (SoftSwim B):35ppm
    Biguanide Shock (SoftSwim C): 49ppm
    Borate: 90ppm

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

    Re: Borate levels that won't go down!

    Most of the borate tests that are available are not especially precise. It is quite possible that they simply report anything over 80 as 90.

    We don't recommend borates be over 80, but that isn't because of any specific danger, we are just being conservative.
    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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    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: Borate levels that won't go down!

    Mix your pool water 50/50 w distilled water, test and multiply the result by 2. That wil give you a better reading than the pool store.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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    Re: Borate levels that won't go down!

    This post has information about a new borate test that seems to be more accurate.

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