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Thread: Green Pool - Shock Level

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    Green Pool - Shock Level

    New to TFP...I have been fighting algae since shortly after opening my pool 3 week ago. I have always used a local pool store to test water and make recommendations, but I am really frustrated with them. So I bought the Leslie's DPD test kit. I began this morning by adding 192 oz of bleach. Reading are as follows:

    FC 3
    TC 5
    PH 7.2
    TA 80
    CH 230
    CYA 50

    I have read about getting FC to "shock level" to kill algae. Looks like I should get FC to around 22 for a shock level. However, my kit reads Cl from .5 to 5. How do I get readings in the 20s?
    22,000 gallons
    IG, vinyl
    1 HP, 63

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    Join Date
    Feb 2008
    Flower Mound, TX

    Re: Green Pool - Shock Level

    Welcome to TFP!

    The only way for you to accurately test FC levels above 5 ppm is for you to use a kit with a FAS-DPD chlorine test. The Taylor K-2006 or TF-100 kit (link in my sig line) will allow you to test this way.

    Yes, you must get to FC to shock level for your CYA and hold it there until your pool clears.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

  3. Back To Top    #3
    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Re: Green Pool - Shock Level

    You can also add an individual FAS-DPD only test to your existing kit. sells them in their individual test section

    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from
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  4. Back To Top    #4

    Re: Green Pool - Shock Level

    Thanks for the prompt response - I took back the test kit and they ordered me the FAS-DPD. I'll try to attack the pool when it comes in.
    22,000 gallons
    IG, vinyl
    1 HP, 63

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