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Thread: Stopping the Problem

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    Stopping the Problem

    Hello everyone, new to the forum. I've been noticing very low to no chlorine levels in my pool for a couple of weeks. Taken water samples to a couple of pool stores, CYA levels at 60 at one store, next day took to another it was at 0. Don't worry, ordered the TFT100 yesterday and will check it myself from now on. After reading through this forum I understand I must SLAM since chlorine is almost none excitant even though there's no visible algae but water gets cloudy after heavy swimming. My pool builder set up my SWG to 50% running the pump at 24 hours, 21 on low and 3 on high to run my sweeper. After SLAM is complete, how do I keep my SWG running high enough not to have this problem again? I would have figured with it running for 12 hours a day I would not have this problem. Also, direct sunlight on pool for about 80% of the day, water temperature is at 89 without the heater. Thanks in advance for the advise.
    Built March 2015 13000 gallon free form exposed aggregate with sheer descent, Jandy 2HP VSP, Jandy 1400 SWG with Aqualink PDA and AquaCal electrical heater. Pentair Clean and Clear filter 150SF. TF100 test kit. Pentair Kreepy Krualy Great White.

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    Mod Squad jblizzle's Avatar
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    Re: Stopping the Problem

    Well if your CYA is too low, then the SWG will not be able to overcome the FC losses so that might be the problem (along with stuff starting to grow). The test kit should clear up our questions when it arrives.

    You should not need to run your pump that long and that size SWG should EASILY be able to keep adequate FC levels with a much shorter run time.
    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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    Azgirl71's Avatar
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    Apr 2015
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    Re: Stopping the Problem

    Welcome to TFP! Good call ordering your TF 100! Once you get your test please post a full set of numbers.

    FC
    CC
    PH
    TA
    CYA
    CH

    We will help you help your pool.
    As for the SWG you won't need it during a SLAM. We can address that later.

    I encourage you to explore PoolSchool while in the meantime.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Re: Stopping the Problem

    There could be a couple of things that are causing the low FC level so we need accurate test results to determine what is causing it. When you receive the TF-100 run all the tests and report them.

    A very low CYA level could be part of the problem and having nascent algae could be another. With the TF-100 you will be able to run an OCLT to determine if you have organics that are consuming the FC as it is being made by the SWG.

    After this issue is fixed, the SWG should be able to handle the pool water just fine but you will need to test and balance as needed by following our guidelines.

    I would add a gallon of bleach for now to raise the FC since SWG's are not great at raising the FC level but are more ideal to maintain it. Keep adding a gallon of bleach a day until the TF-100 comes in.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Defgufman's Avatar
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    Re: Stopping the Problem

    Quote Originally Posted by ping View Post
    There could be a couple of things that are causing the low FC level so we need accurate test results to determine what is causing it. When you receive the TF-100 run all the tests and report them.

    A very low CYA level could be part of the problem and having nascent algae could be another. With the TF-100 you will be able to run an OCLT to determine if you have organics that are consuming the FC as it is being made by the SWG.

    After this issue is fixed, the SWG should be able to handle the pool water just fine but you will need to test and balance as needed by following our guidelines.

    I would add a gallon of bleach for now to raise the FC since SWG's are not great at raising the FC level but are more ideal to maintain it. Keep adding a gallon of bleach a day until the TF-100 comes in.
    That is good advice. A gallon a day will add about 6 FC to the pool.
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

    Pool School, Pool Math, CYA to FC ratio chart, Testing Kits

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    Re: Stopping the Problem

    Thanks for the quick responses. Think I figured out why the algae began to grow. I lowered my pump to run at a lower setting, there wasn't enough flow through the SWG to generate chlorine, got a no flow reading.
    Built March 2015 13000 gallon free form exposed aggregate with sheer descent, Jandy 2HP VSP, Jandy 1400 SWG with Aqualink PDA and AquaCal electrical heater. Pentair Clean and Clear filter 150SF. TF100 test kit. Pentair Kreepy Krualy Great White.

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    Mod Squad jblizzle's Avatar
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    Re: Stopping the Problem

    Yeah, I have to keep an eye on that. If the filter starts to get dirty, low speed quickly for me becomes not enough flow for the SWG.
    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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