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Thread: New Pool and the Chlorine and Alkalinity is low

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    Reddogdan's Avatar
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    New Pool and the Chlorine and Alkalinity is low

    I want to get started right and i'm already lost. The pool is only two weeks old and I don't understand the inline chlorinator. I currently have it set on 4 1/2 with 3 three inch tabs. I cant seem to get the FC up to 1 without shocking. Any guesses? Add more tabs? crank it to 5? Thanks for the help, i'm sure i'll be around for awhile.

    FC .5
    TA 70
    PH 7.6
    CH 400
    Temp 81
    14.3k, 3 1/2-5 1/2, IG, Pebble Wet Edge Northshore Tahoe, Jandy 4 cartridge, Jandy 2hp variable, Pentair 320 inline chlorinator fed by a Stenner, Polaris 280, K-2006 test kit, Built 9/13
    Fill water: TA=90, PH=70, CH=90

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    Mod Squad jblizzle's Avatar
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    Re: New Pool and the Chlorine and Alkalinity is low

    Welcome to TFP!!!

    I assume by CH in your test you actually mean the chlorine (FC). What is your stabilizer level (CYA)? How are you getting your test results?

    Generally we do not recommend the use of tablets due to the continual build-up of CYA which in turn requires higher FC levels, see FC/CYA Chart. But, since your pool is new, likely your CYA is too low and you are losing all the FC to the sun. Best solution is get a Recommended Test Kit, add stabilizer separately up to 30-40ppm, and then maintain the FC with bleach.

    Have you seen and read Pool School?
    Start with these articles:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool

    EDIT: And BTW, you TA is fine if you switch to using liquid chlorine. If you are going to continue to try to use pucks, then you should raise the TA using baking soda up to around 100ppm. See the poolcalculator to determine the amount needed.
    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
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    Reddogdan's Avatar
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    Re: New Pool and the Chlorine and Alkalinity is low

    Yes FC instead of PH. I have since edited. I am using the Pentair 78HR kit that came with my startup and the water hardness kit to keep up with my daily numbers for the first month to not void my warranty. Every three days I go to Leslies to get more detailed readings. These are the readings from two days ago from Leslies: FC 1, CH 110, CYA 55, TA 50, PH 7.6 . We were told to schock the pool and add 15 lbs for hardness plus.
    14.3k, 3 1/2-5 1/2, IG, Pebble Wet Edge Northshore Tahoe, Jandy 4 cartridge, Jandy 2hp variable, Pentair 320 inline chlorinator fed by a Stenner, Polaris 280, K-2006 test kit, Built 9/13
    Fill water: TA=90, PH=70, CH=90

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    Mod Squad jblizzle's Avatar
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    Re: New Pool and the Chlorine and Alkalinity is low

    If you spend any time reading here, you will quickly realize that:
    A: pool store testing is worthless (as are test strips
    B: mixing our advice with that from a pool store is not going to work.

    Recommendations in my previous post stand.
    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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