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Thread: If you use the LQ, do you use the SWG CYA/chlorine chart?

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    flyboy320's Avatar
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    If you use the LQ, do you use the SWG CYA/chlorine chart?

    As the title suggests, do I use the SWG chart or the non-SWG chart if I am using a LQ to determine my CYA/chlorine ratio?
    10K gal IG, vinyl, 1 HP Jandy Stealth pump, Jandy CS cartridge filter, Delta UV system, Hasa Liquidator

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    Mod Squad Bama Rambler's Avatar
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    Re: If you use the LQ, do you use the SWG CYA/chlorine chart?

    I use the standard chlorine/CYA values. I'm not sure whether the SWCG does something extra or whether there just isn't enough data collected on the LQ to add it to the chart.
    Dave J. TFP Moderator
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    JasonLion's Avatar
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    Re: If you use the LQ, do you use the SWG CYA/chlorine chart?

    You should use the regular (non-SWG) chart with the Liquidator. There isn't enough data to be totally sure, but so far nearly everyone who tried SWG FC levels with the Liquidator has had problems.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    flyboy320's Avatar
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    Re: If you use the LQ, do you use the SWG CYA/chlorine chart?

    OK, thanks guys, I thought the SWG chart was based on the fact that the FC levels are held stable (for the most part) through the day by continuously adding chlorine to the pool, unlike the manual method of adding chlorine where it's added just once a day.
    10K gal IG, vinyl, 1 HP Jandy Stealth pump, Jandy CS cartridge filter, Delta UV system, Hasa Liquidator

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    Re: If you use the LQ, do you use the SWG CYA/chlorine chart?

    The SWG chart is based on observational experience. We don't really know the true reason as to why a lower chlorine level works OK for SWG pools. Some of it may be the more consistent dosing so that it doesn't get too low but some of it may be some super-chlorination of a portion of the pool water going through the cell. I suspect it's a little bit of both though more of the latter, but to play it safe we recommend the normal dosing chart. Of course, you are free to experiment with what works in your own pool and report back to us what you find.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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