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Thread: Question about Chlorine (Bleach)

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    Join Date
    May 2014
    Location
    NYC
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    47

    Question about Chlorine (Bleach)

    I just opened my pool and my pool pump has been under-performing for a few day (fixed now) and every night I always check the FC and CC. Last night I did the test and my results were
    FC 8.5
    CC under .5

    This morning my results were
    FC 8
    CC under .5

    I think based on the numbers, I pass the OCLT but I will do it again tonight just to be sure and continue SLAM today

    My question is, I still have some debris in the pool such as dirt, pollen and some leaves (not many of these) on the bottom because my pump was not working to its optimum, it was not cleaning the way it should be. Will these items in the pool consume the chlorine? Should I pass the OCLT with the pool still a little dirty?
    12' x 18' Oval Above Ground Pool (buried 2')
    Manufacturer states ~5,000 gallons
    Pentair CC75 Cartridge Filter System 1-HP Opti-Flo Pump
    Bleach Chlorination Method
    Aquabot Junior Vacuum

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Question about Chlorine (Bleach)

    Your OCLT is valid, and has passed. Usually you will lose more chlorine than that if there is any debris on the bottom.

    Regardless, you should clean any debris off the bottom as soon as possible.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Richard320's Avatar
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    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Question about Chlorine (Bleach)

    The bleach will try to oxidize those organics, but not at a fast rate. So it's possible to pass the OCLT with some crud in there. However, you fail the primary test to stop the SLAM: The water is clear. That includes walls and floors. Vacuum that crud up, clean all the baskets. The debris is still sharing the same water and FC as the stuff in the pool. Nobody but us is impressed with test results. Normal people want to see crystal clear water and no debris and a sparkle on the surface ripples that makes them say "Oooh!"
    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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    Join Date
    May 2014
    Location
    NYC
    Posts
    47

    Re: Question about Chlorine (Bleach)

    Thanks guys! Without this website I wouldn't be able to get to where I am today. Weeks ago I knew nothing about pools and now I feel more confident.

    I want to stop SLAM so I can use my aquabot vacuum since I do not have a regular vacuum (I should probably get one) and clean up the debris on the bottom.
    12' x 18' Oval Above Ground Pool (buried 2')
    Manufacturer states ~5,000 gallons
    Pentair CC75 Cartridge Filter System 1-HP Opti-Flo Pump
    Bleach Chlorination Method
    Aquabot Junior Vacuum

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