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Thread: ECO-matic producing a LOT of chlorine

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    Elgrecus's Avatar
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    Feb 2013
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    Los Angeles, CA
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    ECO-matic producing a LOT of chlorine

    I started with a nasty green swamp and thanks to TFP I have absolutely crystal clear water. After shocking the pool, my FC level slowly dropped to almost zero in about three weeks. I added enough bleach to bring it to FC 3.5 ppm. I then inspected my ECO-matic ESC 36 and discovered a lot of scale. I realized it was not producing chlorine. After cleaning it in a diluted muriatic solution, it started working again just fine. I began running it at 100% for 5 hours per night (3:00 AM to 8:00 AM since electricity rates are so high here in Los Angeles). After a week, my FC level was up to 13.5 ppm. I reduced the run time to 4.5 hours and waited a week. I was up to 18.0 ppm. I then reduced it to 4 hours and now I am up to 18.5 ppm. Tonight I dropped the run time to 3 hours. My salt levels are high, but I am not sure how high. My Aquachek salt strips are giving me erratic results. Sometimes they say 4500 ppm (which is, believe it or not, ECO-matic's recommended minimum), other times they say 7000 ppm. I am going to buy the Taylor K-1766 in order to get more accurate readings, but in the meantime I am wondering why I am getting such excessive CH levels. I do have a small pool at 9000 gallons, but 4 hours a night of run time is not so great. Based on my pumps GPM, I recently read that 1.5 hours would turn the water over once per night (I have 15 feet of head). Am I approaching this the right way by decreasing the run time by half an hour a week? I did just drop it by an hour tonight, but if ECO-matic suggests an FC level of 1.0 to 3.0 ppm, I at way, way over that. Any thoughts? We're swimming in the pool just fine but my eyes are feeling a little bit of burning in the evenings. The kids don't feel a thing. Any thoughts are appreciated.
    Pool Size: 9,000 gallons
    Pool Type: In ground, plaster
    Filter: Pentair 4000 Series D.E. Filter
    Pump: 1 HP Pentair Whisperflo WFE-4
    Heater: Sta-Rite Max-E-Therm 200
    Salt System: ECO-matic ESC 36
    Pool Cover: CoverStar, motorized cover

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    duraleigh's Avatar
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    Sebring, Florida
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    Re: ECO-matic producing a LOT of chlorine

    What is your CYA level?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Jun 2008
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    Scottsdale, AZ
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    37

    Re: ECO-matic producing a LOT of chlorine

    Why are you running at 100%? That's not good for cell life. In addition to reducing run time dial down the SWG.
    Gary
    18 x 38 28800 gals gunite inground;Purex Triton High Rate Sand Filter;1 HP 2 Speed Hayward Tristar Pump; Raypak Heater
    Aquabot Bravo; Goldline Aqua Logic Controller/SWG

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    Elgrecus's Avatar
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    Feb 2013
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    Los Angeles, CA
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    Re: ECO-matic producing a LOT of chlorine

    My current CYA is 55 ppm. When we bought the house the CYA was at 20 ppm. I've been slowly bringing it up to ECO-matic's recommended 50-80 ppm.

    I haven't really done much research on what level I should be running the SWG. Should I reduce it to 90% for this week and see how it goes. Does that sound about right? Should I dial it back by 10% each week and reduce run time by 30 minutes per week until I hit the right FC level? Thanks for you responses.
    Pool Size: 9,000 gallons
    Pool Type: In ground, plaster
    Filter: Pentair 4000 Series D.E. Filter
    Pump: 1 HP Pentair Whisperflo WFE-4
    Heater: Sta-Rite Max-E-Therm 200
    Salt System: ECO-matic ESC 36
    Pool Cover: CoverStar, motorized cover

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    duraleigh's Avatar
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    Sebring, Florida
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    Re: ECO-matic producing a LOT of chlorine

    With that CYA, you should be running SWG enough to maintain 3-5 ppm chlorine. Adjust it until it holds that level.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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