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Thread: Will clarifier give you an inaccurate CYA reading?

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    Will clarifier give you an inaccurate CYA reading?

    I used Super Blue clarifier in my pool 24 hours ago. I checked my CYA level today and it is less than 30. (Using Taylor K-1005 Test Kit)

    Will clarifier give you and inaccurate CYA reading? If so, when should I test CYA again for an accurate reading?

    1 week ago, CYA was 43. I have not added any fresh water.

    My pool is concrete and approx 15,000 gals.
    Concrete inground pool in Texas
    approximately 15,000 gals

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    JasonLion's Avatar
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    Re: Will clarifier give you an inaccurate CYA reading?

    Clarifier does not usually have a detectable effect. Keep in mind that the CYA test is a little tricky to do and is very sensitive to lighting. The test is designed to be done in bright indirect sunlight. Doing the test indoors or in cloudy weather will result in lower than actual readings.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Mod Squad jblizzle's Avatar
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    Re: Will clarifier give you an inaccurate CYA reading?

    Wait, wouldn't lower lighting result in higher CYA readings with a lower water level in the tube obscuring the dot due to less light? I don't know why this always seems to confuse me.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    4knights's Avatar
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    Re: Will clarifier give you an inaccurate CYA reading?

    Does it make a difference with type of lighting when you use the magic stir w built in light?
    Ron- Kansas. IG fiberglass, Riviera 30 Freeform 13600 gallons,
    EasyTouch 4 w/IC20 SWCG, Pentair Whisperflo 1hp, 2 speed 220 pump, Hayward ProGrid 4820 DE filter using Eco Klean instead of DE, 2 Savi Melody 12v 5 color LEDs, Raypack 266k btu millivolt heater, Arctic Armour Mesh custom safety cover (Total self Install) TF-100 test kit w/Magic stir.

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    Mod Squad jblizzle's Avatar
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    Re: Will clarifier give you an inaccurate CYA reading?

    The CYA test does not use the Speedstir.

    Posted from my Droid with Tapatalk ... sorry if my response is short
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    4knights's Avatar
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    Re: Will clarifier give you an inaccurate CYA reading?

    Quote Originally Posted by jblizzle
    The CYA test does not use the Speedstir.

    Posted from my Droid with Tapatalk ... sorry if my response is short
    Thanks, I haven't done it but once, and that was last summer when I put the pool in.
    Ron- Kansas. IG fiberglass, Riviera 30 Freeform 13600 gallons,
    EasyTouch 4 w/IC20 SWCG, Pentair Whisperflo 1hp, 2 speed 220 pump, Hayward ProGrid 4820 DE filter using Eco Klean instead of DE, 2 Savi Melody 12v 5 color LEDs, Raypack 266k btu millivolt heater, Arctic Armour Mesh custom safety cover (Total self Install) TF-100 test kit w/Magic stir.

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