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Thread: Hayward T-15 40k SWCG on 33,000 gallon pool HELP PLS

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    Hayward T-15 40k SWCG on 33,000 gallon pool HELP PLS

    We have been battling a low chlorine level since the pool was started in February 13. First issue we had for 3 months was the builder installed the Hayward Filter backwards because they changed the inlet and outlet and he didn't read the instructions.

    Next our controller went out, install new and the system still doesn't work, we have cleaned the SWG often.

    Questions
    1. Is my pool to big for a 40k SWG? I run the pool for 14 hours a day on 100%

    2. To boost Chlorine, should i use bottled bleach? How much?

    3. The PH is always high... off the chart, we balance with Mur acid. What causes this.

    That s all i can think of, i'm offshore right now.

    Thanks,
    39500 gallon in ground pool, Gunite/Plaster, Purex Triton WhisperFlo 3hp, Purex Triton Triton II M#TR-140 Sand filter, Pentair 300-29 Chlorinator.
    1500 gallon in ground spa, Gunite/Plaster, Purex Triton WhisperFlo 1hp, Purex Triton Triton I Sand filter M#100, Pentair 300 Chlorinator.
    240 unit multi-family apartment complex.

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    Mod Squad Bama Rambler's Avatar
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    Re: Hayward T-15 40k SWCG on 33,000 gallon pool HELP PLS

    Welcome to TFP.

    You're real close on size for the swg, but we need to determine if it's a size problem or a chem balance problem. In order to do that you need a good test kit and some good test results.

    Do you have any test results that you can post?
    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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    Re: Hayward T-15 40k SWCG on 33,000 gallon pool HELP PLS

    I don't right now, but i will get those from my wife (i'm offshore) and enter them into that nifty pool calculator and post it here...

    I bought a salt tester today, should be at the house tomorrow. i don't trust this Hayward control panel.
    39500 gallon in ground pool, Gunite/Plaster, Purex Triton WhisperFlo 3hp, Purex Triton Triton II M#TR-140 Sand filter, Pentair 300-29 Chlorinator.
    1500 gallon in ground spa, Gunite/Plaster, Purex Triton WhisperFlo 1hp, Purex Triton Triton I Sand filter M#100, Pentair 300 Chlorinator.
    240 unit multi-family apartment complex.

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    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    Re: Hayward T-15 40k SWCG on 33,000 gallon pool HELP PLS

    The generation of FC by the SWG actually causes the pH to rise, and could be worse if your TA is high. You are running that SWG a lot, so you are going to struggle with the pH.

    Likely you will need to do the OCLT to see if something is in the water consuming the FC that is being generated.

    Or if your CYA is too low, then the sun may be consuming a lot of the FC.
    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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