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Thread: Saltwater Pool with .1 PPM chlorine

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    Saltwater Pool with .1 PPM chlorine

    Hi all - 1st time poster. I've lurked on your forum for awhile and you guys are all great.

    I have a question. I have a saltwater filter for a 14'x42" intex pool and leave it on the recommended 5 hours per day. However lately I've been noticing some brownish algae so I tested the water at the pool place and it was .1 PPM

    My results were

    .1 chlorine
    7.4 PH
    10 stabilizer
    2730 salt

    What I was going to do was add some stabilizer then shock the pool. Is that ok? Any suggestions? Can I use household chlorox bleach instead of shock? Should I add more salt and boost my chlorine production. Thank you!
    Location: Long Island, NY
    Gallons: 5000 Gallons
    Pool: 15' Saltwater 5000
    Filter: Pentair 1 HP Optiflow Pump w/ Clean & Clear 75Sq Ft Cartridge Filter
    SWG: Intex CS8110

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    msgtdan's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    Welcome,

    You need to follow the SLAM process.
    Add enough CYA to get you up to 30 ppm while you're SLAMing, then once clear take it up high to help protect from the sun. Absolutely use bleach, unscented regular/ultra bleach.
    Dan D
    Used 2003 Aqua Leader 27'x52", 17,800 w/10" hopper, SwimPro SW256T 250# sand filter, Hayward PowerFlo LX pump 1hp impellor, Emerson 1 1/2 hp motor, setup Aug 2012 Summer 2011 used Summer Escapes Ring pool 14' x 42", Intex 1600gph sand filter, HTH 6 way test kitTF-100 w/stirrer, Well water @ FC=0, PH=7.2, TA=290, CH=320

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    Re: Saltwater Pool with .1 PPM chlorine

    Yep, no splash proof or outdoor bleach.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    linen's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    Welcome to tfp, richierich

    I am not aware of any accurate test kits that can measure cya (stabilizer) down to 10 ppm. Have you used any stabilizer, or any trichlor pucks or dichlor powdered chlorine? They also contain cya. If in the end you/we are uncertain of your cya level, a drain/refill might be most efficient.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Saltwater Pool with .1 PPM chlorine

    Quote Originally Posted by msgtdan
    Welcome,

    You need to follow the SLAM process.
    Add enough CYA to get you up to 30 ppm while you're SLAMing, then once clear take it up high to help protect from the sun. Absolutely use bleach, unscented regular/ultra bleach.
    so use stabilizer first then once its 30 ppm then shock the pool with Clorox household bleach? I guess I was quite na´ve, I thought the salt water filter eliminated the use for any chemicals at all, but I guess that's not true. Do I need to add salt also? I guess using the "boost" function won't bring my chlorine up enough.
    Location: Long Island, NY
    Gallons: 5000 Gallons
    Pool: 15' Saltwater 5000
    Filter: Pentair 1 HP Optiflow Pump w/ Clean & Clear 75Sq Ft Cartridge Filter
    SWG: Intex CS8110

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    Richard320's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    Quote Originally Posted by richierich
    Quote Originally Posted by msgtdan
    Welcome,

    You need to follow the SLAM process.
    Add enough CYA to get you up to 30 ppm while you're SLAMing, then once clear take it up high to help protect from the sun. Absolutely use bleach, unscented regular/ultra bleach.
    so use stabilizer first then once its 30 ppm then shock the pool with Clorox household bleach? I guess I was quite na´ve, I thought the salt water filter eliminated the use for any chemicals at all, but I guess that's not true. Do I need to add salt also? I guess using the "boost" function won't bring my chlorine up enough.
    The only thing the Saltwater generator does is create the free chlorine on-site, rather than at a chlorox factory. Everything else is the same as a bleach pool.

    Have you read Pool School at all? There's tons of information in there, from really basic to advanced, depending on how many pages in you want to go. It can answer questions you haven't even thought to ask yet.

    What has happened is that your stabilizer level was too low, so the sun got to the chlorine before the chlorine could get to the organics, which let the chlorine level get too low, and now algae has taken hold. So now you have to kill it, completely, and raise the stabilizer level in two steps. First to about 30 so you can keep bleach in there long enough to kill algae (SLAM) and when it's all clear, up to 70ish.

    It will be a rough couple days for you, maybe even a week, but after that, you'll understand it all and your water can stay clear and sparkly for the rest of the season.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Saltwater Pool with .1 PPM chlorine

    Quote Originally Posted by Richard320
    Quote Originally Posted by richierich
    Quote Originally Posted by msgtdan
    Welcome,

    You need to follow the SLAM process.
    Add enough CYA to get you up to 30 ppm while you're SLAMing, then once clear take it up high to help protect from the sun. Absolutely use bleach, unscented regular/ultra bleach.
    so use stabilizer first then once its 30 ppm then shock the pool with Clorox household bleach? I guess I was quite na´ve, I thought the salt water filter eliminated the use for any chemicals at all, but I guess that's not true. Do I need to add salt also? I guess using the "boost" function won't bring my chlorine up enough.
    The only thing the Saltwater generator does is create the free chlorine on-site, rather than at a chlorox factory. Everything else is the same as a bleach pool.

    Have you read Pool School at all? There's tons of information in there, from really basic to advanced, depending on how many pages in you want to go. It can answer questions you haven't even thought to ask yet.

    What has happened is that your stabilizer level was too low, so the sun got to the chlorine before the chlorine could get to the organics, which let the chlorine level get too low, and now algae has taken hold. So now you have to kill it, completely, and raise the stabilizer level in two steps. First to about 30 so you can keep bleach in there long enough to kill algae (SLAM) and when it's all clear, up to 70ish.

    It will be a rough couple days for you, maybe even a week, but after that, you'll understand it all and your water can stay clear and sparkly for the rest of the season.

    Ok thanks for the help. I understand after reading the links. Stabilizer first, then shock it. 2 more questions though, should I add a small amount of salt to bring my PPM up to 3000 and I know the shock gives you a guide on what to add but how much should you add for Clorox bleach, I have 3,500 galloon intex metal frame pool
    Location: Long Island, NY
    Gallons: 5000 Gallons
    Pool: 15' Saltwater 5000
    Filter: Pentair 1 HP Optiflow Pump w/ Clean & Clear 75Sq Ft Cartridge Filter
    SWG: Intex CS8110

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    pwrstrk's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    You need to be at 13 ppm for shock level with a CYA level of 30 ppm. To get to 13 ppm of FC pool calc says to add 3 qt's of bleach. Remember to set your PH to 7.2.

    I'd wait to add salt after slamming.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    msgtdan's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    Pool Calculator

    Can help you with dosage levels, set your pool volume at the top, and other pool info at the bottom. Then what you readings are now in the left column, where you want to be in the right column.
    Dan D
    Used 2003 Aqua Leader 27'x52", 17,800 w/10" hopper, SwimPro SW256T 250# sand filter, Hayward PowerFlo LX pump 1hp impellor, Emerson 1 1/2 hp motor, setup Aug 2012 Summer 2011 used Summer Escapes Ring pool 14' x 42", Intex 1600gph sand filter, HTH 6 way test kitTF-100 w/stirrer, Well water @ FC=0, PH=7.2, TA=290, CH=320

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    Isaac-1's Avatar
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    Re: Saltwater Pool with .1 PPM chlorine

    All your SWG does is create a slow trickle of chlorine on site instead of using bleach, at the moment you need to use bleach in jugs to kill off all the algae, once things are back under control you can get your chemicals balanced and switch back to the SWG for daily chlorination. Even with an SWG you need to test and balance your pool chemistry, there is a lot more than just chlorine to a correctly balanced pool, you also need to keep your pH, TA, CYA stabilizer, and Salt levels under control, and at least be generally aware of your CH level (CH is not much of an issue with vinyl pools).

    Ike
    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
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