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Thread: Very High Chlorine Level

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    Very High Chlorine Level

    The chlorine level is very high; instead of a yellowish color, it goes straight to a darker shade of orange. Slight algae growth that I brush away weekly. Recently purchased TF-100 and ran through the tests a few times. Not sure what to do next to have a trouble free pool. Thanks for your help. Latest results:
    Cl = orange color
    pH = 7.2 to 7.5
    FC = 46.5
    CC = 0
    CH = 875
    TA = 100
    CYA = 120
    Local water some restrictions
    14K gal / IG-Plaster / Cartridge / VS Pump / 1991 / TF-100 / In-line feeder

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    Re: Very High Chlorine Level

    Welcome to the forum! Lots of great resources and nice folks to help you around here. I'll start with a few observations and questions. Good job on getting a quality test kit, the number one tool you need for a trouble free pool!

    How are you chlorinating your pool, bleach, pucks, salt water chlorine generator?

    With your chlorine over 10, the pH test will be invalid. Also, you CYA could be much higher, please look at number 9 here, Pool School - CYA , and retest using a 50/50 mixture of pool water and tap water and multiple your result by 2.

    With your CH and CYA as high as they are, you will be looking at having to replace water to have a trouble free pool and only use bleach or SWG as your chlorination method, no more pucks or shock powder. Those 2 are what got your pool where it currently is.
    310 gallon Tiger River Sumatran Spa, covered, standalone, fiberglass, Bleach
    11,000 gallon in-ground plaster pool, Hayward SmartFilter 550 (cartridge), CompuPool(Hayward) T-15 SWG, Hayward Super II pump
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    domct203's Avatar
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    Re: Very High Chlorine Level

    Quote Originally Posted by kevinshima View Post
    The chlorine level is very high; instead of a yellowish color, it goes straight to a darker shade of orange. Slight algae growth that I brush away weekly. Recently purchased TF-100 and ran through the tests a few times. Not sure what to do next to have a trouble free pool. Thanks for your help. Latest results:
    Cl = orange color
    pH = 7.2 to 7.5
    FC = 46.5
    CC = 0
    CH = 875
    TA = 100
    CYA = 120
    Local water some restrictions
    Welcome to TFP!

    Did you purposely extra-dose the pool to get such an elevated FC level? Did you get 46.5ppm buy using a 10ml sample size and 93 drops of R-871?

    You really need to do the diluted CYA test as mentioned above so we can get a better understanding of your pool, and stop using those pucks in the inline feeder. If you have visible algae, there are thousands of algae spores that you don't see. There is no acceptable level of algae in a swimming pool.
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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    Re: Very High Chlorine Level

    Thank you for your replies and suggestions. I am using pucks in a Pentair in-line feeder. It was a habit to just keep it full of pucks, but the feed is turned off now. Will retest this weekend and follow your guidance. Thanks again.
    14K gal / IG-Plaster / Cartridge / VS Pump / 1991 / TF-100 / In-line feeder

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    Re: Very High Chlorine Level

    Those pucks are what is driving up your CYA. Only use liquid chlorine, aka bleach. You can purchase this from the pool $tore in 10% or 12.5% strengths, or from your local Walmart as regular laundry bleach at 8.25%. Just be sure that it is plain old bleach, no additives like scents, or 'splashless' thickeners.

    Please have a read through Pool School, it will explain what we teach for a Trouble Free Pool:
    Pool School

    This will explain the terms we use here, as well as managing chemicals:
    ABC's of Pool Water Chemistry

    Recommended Levels

    Recommended Pool Chemicals

    How to Chlorinate Your Pool

    Chlorine CYA Chart

    Pool Calculator Instructions

    Ask any questions you may have, we love questions!

    Nice to have you here with us.
    Dom - TFP Guide
    Intex 18' X 48" Ultra Frame AGP 6700 gallons | Two Intex CS8110 SWG's | Hayward Pro Series 21" Sandfilter | Hayward 1.5HP Power Flo Matrix pump | Hayward Thru-wall Skimmer | Wanda the Whale | 72 sq ft of Sungrabber Solar Panels with Hayward GLC-2P-A | Taylor K2006 Test Kit, Sample Sizer & Speed Stir | Click Here To Become a TFP Supporter!

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    Re: Very High Chlorine Level

    Thank you for your guidance. I'll retest tonight and update. Do you suggest reducing the chorine level with a removal additive, then reintroduce chlorine using liquid?



    Quote Originally Posted by domct203 View Post
    Those pucks are what is driving up your CYA. Only use liquid chlorine, aka bleach. You can purchase this from the pool $tore in 10% or 12.5% strengths, or from your local Walmart as regular laundry bleach at 8.25%. Just be sure that it is plain old bleach, no additives like scents, or 'splashless' thickeners.

    Please have a read through Pool School, it will explain what we teach for a Trouble Free Pool:
    Pool School

    This will explain the terms we use here, as well as managing chemicals:
    ABC's of Pool Water Chemistry

    Recommended Levels

    Recommended Pool Chemicals

    How to Chlorinate Your Pool

    Chlorine CYA Chart

    Pool Calculator Instructions

    Ask any questions you may have, we love questions!

    Nice to have you here with us.
    14K gal / IG-Plaster / Cartridge / VS Pump / 1991 / TF-100 / In-line feeder

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    Mod Squad jblizzle's Avatar
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    Re: Very High Chlorine Level

    There is no need to try to actively lower the FC level, it will drop pretty quickly on its own.
    Depending on how high the CYA actually is, your FC may not even be really high.

    Regardless, you are at a point where you need to replace water to get the CYA down. I may not even bother with testing anything again until after you replace 50% of the water and then see where your CYA level is. You might have to do that a couple times and then follow the SLAM to clear up the algae.
    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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    Re: Very High Chlorine Level

    OK, will replace at least 50% next weekend.
    Latest readings:
    Cl = orange (not dark orange anymore)
    pH = 7.4 to 7.5
    FC = 36.5
    CC = 0
    CH = 525
    TA = 160
    CYA = 200 (using 50% test method)
    14K gal / IG-Plaster / Cartridge / VS Pump / 1991 / TF-100 / In-line feeder

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    Mod Squad jblizzle's Avatar
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    Re: Very High Chlorine Level

    Might need 2 50% drains if the CYA is that high. You could drain more if you know ground water is not a worry. I just did a full drain last weekend.
    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!

  10. Back To Top    #10

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    Re: Very High Chlorine Level

    High CYA is a pain to maintain a pool. Plus it's expensive to boot. You have to lower it.
    36,000 gallon IG Gunite (40 x 20), 1.5 HP Hayward pump, Pentair Nautilus NS-48 DE filter, 2 skimmers, 12 - (2 x 20) Fafco Solar Panels (Goldline controller not hooked up yet), Hayward Swimpure Plus SWG, Blue Pearl Robot cleaner. New Dr. Wellness X-12 standalone Lifestyle Spa.

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