Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: algee attack!!!! mom needs your help!!!

  1. Back To Top    #1

    algee attack!!!! mom needs your help!!!

    please help i can not keep my chlorine levels up. i am being attacked by chlorine i used the pool caculator and this is what it said. is this okay. i have a 18000 gallon pool, de filter, plaster walls. thank for the help. i'm a mom in trouble, her kid cant swim in the pool and it is 95 here in tx !!!! im using super shock 73%. it seems like i am always having to shock it and algee still comes back in 3-4 days. i have not went to liquid chlorine yet but my plan is to get this right and switch.

    FC 0
    TC 0
    CC 0
    PH 7.5
    TA 150
    CH 220
    CYA 30

    SHOCK 13OZ
    muriatic acid 42OZ

  2. Back To Top    #2
    harleysilo's Avatar
    Join Date
    Mar 2012
    North Georgia

    Re: algee attack!!!! mom needs your help!!!

    Where did you get our test numbers?
    18'x43' Sport Pool
    19,000 Gallons Vinyl Liner 3'-3.5'-4'
    SWCG and D.E. Filter
    Test Kits - Pool Calculator - Chlorine/CYA Chart - Pool School

    Secret Weapon for Pool Chemistry Testing

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: algee attack!!!! mom needs your help!!!

    That's because you stopped too soon!

    Your target FC to shock the pool is 13. Using your Cal-hypo 73% (And you won't be able to use it much longer or CH will get too high) you need to add 4 lbs 3 oz. And in an hour or two, you'll need to recheck it and dose it again to get it to 13. And again and again and again and again and again until you pass the three tests in pool-school/shocking_your_pool

    Once it's clear and passes, if you maintain the FC above minimum you will never have to do this again.

    A little inspiration:
    first-time-shocking-with-bleach-t45074.html Check out the pictures!
    frog-filled-green-swamp-to-oasis-work-in-progress-t48213-20.html be sure to look at page 2
    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!

  4. Back To Top    #4
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Houston, Texas

    Re: algee attack!!!! mom needs your help!!!

    Hi, welcome to TFP! You need to complete the shock process on your pool. I don't know where the 13 ounces of shock comes from. I plugged your test results into the Pool calculator and your shock level is 13 ppm of FC. To reach shock level you would need to add 343 ounces of 8.25% unscented bleach. You would then need to re-test every 1-2 hours and add enough bleach to reach shock level again until the process is complete.

    Where are you getting your test results from?
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
    Love TFP? Become a
    TFP Supporter!

  5. Back To Top    #5
    Charlie_R's Avatar
    Join Date
    May 2013
    Mexico, MO

    Re: algee attack!!!! mom needs your help!!!

    Since those are probably pool store number, they all are suspect.

    I would strongly suggest you order a good test kit and test it yourself.

    Household bleach is the preferred method of adding chlorine to pools here.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

  6. Back To Top    #6

    Re: algee attack!!!! mom needs your help!!!

    im using the Taylor K-2005 Complete Test Kit

    thanks for all the replies !!!!

  7. Back To Top    #7
    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Re: algee attack!!!! mom needs your help!!!

    If your using the K-2005 then you only need to add the FAS-DPD chlorine test to it to get a good test kit, the DPD chlorine test included in the K-2005 only reads to 5ppm so there is no way for it to test to the levels you need to maintain for shocking, although you MIGHT get away with using it in this case since you have relatively low CYA, if you dilute your pool sample down with 2 parts chlorine free bottled water and 1 part pool water, then multiply your test by results by 3 (it will introduce more error in the test though), your target FC for shock level is 12 ppm at a CYA level of 30 ppm., given the extra error in the test this way I would aim for 15 ppm FC shock level.


    p.s. without the FAS-DPD test you will not be able to have enough resolution to do an overnight chlorine loss test (OLCT) to know for sure if you have met the goals of shocking though
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from
    ~Remember TFP counts on your donations to keep this site ad free~

Posting Permissions

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