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Thread: What is a safe level of chlorine?

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    What is a safe level of chlorine?

    this article overall seems good
    http://www.poolspa.com/publications/sin ... ocktrt.htm


    However they have a paragraph which says this:

    <<If too much chlorine is added, it may take days to drop to safe levels (less than 5 ppm) before bathing can be resumed.>>

    Based on the CYA/chlorine chart here, my target chlorine is around 6. People here have posted that up to shock levels of chlorine are safe.

    so which is it?
    17,800 gallon, IG pool, 595 sq feet (17x35x4.5 avg rectangle), Hayward 525 cartridge filter, diamondbrite, 2 hp 2 speed hayward tristar filter, Stenner 45mhp10 automatically chlorinating

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    Re: What is a safe level of chlorine?

    You can trust the information you read here. We are fortunate to have some really astute folks on here who know and understand pool water chemistry. You can safely swim in FC at shock values as published in the FC/CYA chart.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    JasonLion's Avatar
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    Re: What is a safe level of chlorine?

    There are a number of statements in that article that I strongly disagree with, including one of their basic premises. There is no need to shock the pool regularly. The only reason to shock is if you have some problem that needs to be addressed. They are also wrong about the breakpoint story, i.e. use 10x CC of FC rule, which is a myth and simply not true. They also fail to take into account how chlorine and CYA interact. Higher CYA levels require higher FC levels to have the same effective chlorine level. As long as your FC level is appropriate for your CYA level you are safe to swim.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: What is a safe level of chlorine?

    We are fortunate to have some really astute folks
    Yep, one of 'em just posted!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: What is a safe level of chlorine?

    i did a little more research and found debates on this topic in the poolforum pretty far back.

    Lots of lack of research posted on both sides. Lots of municipal standards published such as commercial pools getting shut down over 100 ppm CYA or over 10ppm chlorine
    17,800 gallon, IG pool, 595 sq feet (17x35x4.5 avg rectangle), Hayward 525 cartridge filter, diamondbrite, 2 hp 2 speed hayward tristar filter, Stenner 45mhp10 automatically chlorinating

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    Ohm_Boy's Avatar
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    Re: What is a safe level of chlorine?

    Quote Originally Posted by march2012
    i did a little more research and found debates on this topic in the poolforum pretty far back.

    Lots of lack of research posted on both sides. Lots of municipal standards published such as commercial pools getting shut down over 100 ppm CYA or over 10ppm chlorine
    So... what are you looking for from us, specifically?
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

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    Re: What is a safe level of chlorine?

    Quote Originally Posted by Ohm_Boy
    Quote Originally Posted by march2012
    i did a little more research and found debates on this topic in the poolforum pretty far back.

    Lots of lack of research posted on both sides. Lots of municipal standards published such as commercial pools getting shut down over 100 ppm CYA or over 10ppm chlorine
    So... what are you looking for from us, specifically?
    Does anyone have links to studies on the safety of higher levels of chlorine, especially in the presence of CYA. But even without CYA would be interesting.
    17,800 gallon, IG pool, 595 sq feet (17x35x4.5 avg rectangle), Hayward 525 cartridge filter, diamondbrite, 2 hp 2 speed hayward tristar filter, Stenner 45mhp10 automatically chlorinating

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    bobodaclown's Avatar
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    Re: What is a safe level of chlorine?

    Have you seen read this post.
    It's from another forum but some members are on both sites.
    http://www.poolsolutions.com/gd/best-gu ... chart.html
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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