Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: Adding bleach at night, pump turned off.

  1. Back To Top    #1

    Join Date
    Jun 2011
    Location
    Florida
    Posts
    15

    Adding bleach at night, pump turned off.

    I have my pool timer set to operate during day. I usually test water samples and add bleach as needed at night (after work), but my pool pump has turned off at that point. Am I doing any additional damage by not circulating it. Should I run my pump for an hour at night just to get the added bleach circulating? Curious on people thoughts.
    9.5k IG Pool
    Plaster (Diamond Brite)
    Sand Filter

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Adding bleach at night, pump turned off.

    Yes, you can cause some minor damage (plaster is more resilient than vinyl which would be at much greater risk). You are also failing to get the chlorine well mixed into the water until the pump next comes on, and so missing out on some of it's effectiveness.

    You should have the pump running when you add chlorine and for at least 30 minutes afterwards.
    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

  3. Back To Top    #3

    Re: Adding bleach at night, pump turned off.

    If my pool is 45,000 gallons how much househole (Clorox) bleach should I add???

  4. Back To Top    #4

    Re: Adding bleach at night, pump turned off.

    Quote Originally Posted by jetermiler
    If my pool is 45,000 gallons how much househole (Clorox) bleach should I add???
    The Pool Calculator will be your new best friend. Get familiar with it. You will love it.

    I run my filter mainly at night, with a few on cycles during the day when the polaris and waterfall run to keep chlorine circulated. It helps keep the pool cooler I think.

    Edit again -- If you will brush with a Wall Whale pool brush, that moves enough water to do a very good job of circulating chems. Then you could leave the timer as it is. Some mechanical timers are not so easy to reset.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  5. Back To Top    #5

    Can you use regular household bleach???

    Can I use regular bleach ie Clorox to "shock" my pool???? How much should I use for a 45,000 gallon pool????

    Any help would be appreciated....Thank You!!!!

  6. Back To Top    #6

    Re: Can you use regular household bleach???

    Yes. Regular unscented. Cups Quarts Gallons Jugs..... you have to calculate that based on your pool and some test data. Do you have FC, CC, TC, CYA, TA, CH, pool size, surface. We will probably want to learn why you need to shock before you start dumping stuff in your pool.

    See Pool School, Pool Calculator. Be sure to check back with data and questions before you add it, we'll be here.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  7. Back To Top    #7
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Can you use regular household bleach???

    Yes, regular bleach, without any scents or other special features is just fine. Bleach is sodium hypochlorite, the same chemical used in many commercial pools.

    The amount of bleach you need to use depends on your CYA level. You can use the Pool Calculator to make calculations like this one once you know your CYA level.
    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

  8. Back To Top    #8

    Re: Can you use regular household bleach???

    It's a 45,000 gallon plaster/concrete pool..

    TH (total hardness) 250PPM
    TC (total chlorine) .5PPM
    FC (free chlorine) .5 PPM
    pH 7.4
    TA (total alkalinity) 80PPM
    CYA (cyanuric acid) 30-50 PPM

    Is this the info u needed????

    Thanks so much!!!

  9. Back To Top    #9
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Adding bleach at night, pump turned off.

    With CYA around 40, shock level is an FC of 20.

    In 45,000 gallons, to raise FC by 20 you need to add 15 gallons of regular 6% bleach.

    Remember that shocking is a process, not a one time event, so that needs to be followed up as described in Pool School.
    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

  10. Back To Top    #10

    Re: Adding bleach at night, pump turned off.

    Thank u so much will re-read the pool school........

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •