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Thread: TC at 0 for several days - pool still clear - shock?

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    texasdad's Avatar
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    TC at 0 for several days - pool still clear - shock?

    We just got back from a week in the Mountains and I found my TC and CC to be at 0.

    I use a stenner pump and tank on a separate timer from the pool. While gone the timer for the stenner pump lost all it's settings for run times; So no chlorine was added. I don't know what day it stopped working - but looking at my chlorine tank it is still almost full meaning no chlorine was added for most of the week!!

    Amazingly the pool water is still clear.

    Do I need to shock - or just get the TC back to were it belongs?
    13k gallon IG gunite pool
    Jandy 2 speed pump
    Jandy cartridge filter
    Stenner Pump and tank

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    Re: TC at 0 for several days - pool still clear - shock?

    Add some bleach and Perform the Overnight FC Loss Test?
    18' x 42" Intex (4786 Gal @ 80% capacity) Intex 8110 SWCG, 2000 GPH cartridge filter.
    Full Sun, Well Water, Borates at approx. 50
    TFTestKit-100--The Pool Calculator--Pool School

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    Mod Squad jblizzle's Avatar
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    Re: TC at 0 for several days - pool still clear - shock?

    Quote Originally Posted by George N
    Add some bleach and Perform the Overnight FC Loss Test?
    +1

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
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    duraleigh's Avatar
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    Re: TC at 0 for several days - pool still clear - shock?

    Add some bleach and Perform the Overnight FC Loss Test?
    +2
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    texasdad's Avatar
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    Re: TC at 0 for several days - pool still clear - shock?

    I added chlorine to bring tc to 10 last night. TC is at 9 at 8:00 this morning (didn't get up to check it at sunrise).

    Close enough to 0 lose.

    It has been a few weeks since last CYA check, but it shouldn't change much. It's between 50 and 60.

    I think I got really lucky to not have a green pool!

    Now I have to figure out what happened to the timer...........
    13k gallon IG gunite pool
    Jandy 2 speed pump
    Jandy cartridge filter
    Stenner Pump and tank

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    Mod Squad Bama Rambler's Avatar
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    Re: TC at 0 for several days - pool still clear - shock?

    Looks like you got lucky. I'd probably keep the FC at the high side of normal for your CYA a couple of days.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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