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Thread: Starting to clean a green pool with algae

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    Starting to clean a green pool with algae

    Hi friends..I'm starting to treat green pool and remove algae. I've done some homework on this site (pool school etc) over the past 2 weeks. My pool is 24' X 54" deep. Over the last 2 hours I have taken 2 samples listed below:

    1st sample:
    FC 1.0
    PH 8.2
    TA 340
    CH 100
    CYA 40

    2nd sample (1 hour later)

    FC 6
    PH 8.2
    TA 350
    CH 800
    CYA 40

    The pool calculator calls for me to add 23 oz. of muratic acid. Just thought I would ask some experts on here if this seems to be going OK, to make sure I get going on the right foot! Thanks in advance!!

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    pwrstrk's Avatar
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    Re: Starting to clean a green pool with algae

    Have you read the SLAM process in pool school ? Get your PH to 7.2. Your FC level for slamming is 13 - 14 ppm.

    What test kit do you have ?


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Smykowski's Avatar
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    Re: Starting to clean a green pool with algae

    If your size is 15,200 gal, yes, 23oz is reasonable. However, if your pH is above 8.2 prepare for testing and redosing a couple times.

    Please put your full pool specs in your signature.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    Re: Starting to clean a green pool with algae

    Quote Originally Posted by KYLEMOORE1234
    The pool calculator calls for me to add 23 oz. of muratic acid.
    This depends on what you want to lower the pH to, given your starting pH of 8.2.

    Since you have a green pool, you need to begin the The SLAM Process. In order to properly do this, you will need one of the Recommended Test Kits.

    This is a bit of an aside, but I notice a huge difference in the CH readings from the 1st and 2nd samples (going from 100 to 800 in one hour). To reiterate pwrstrk's question, What test kit are you using? This dramatic swing makes me very suspect of the accuracy and is a reason why we often harp on the importance of a good test kit.
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    A good test kit is an investment, not an expense.

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    Re: Starting to clean a green pool with algae

    Thanks guys..Ill give u update in morn!!

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    Re: Starting to clean a green pool with algae

    Ok friends, I just re-tested my pool again and here are my readings:

    FC 7
    PH 7.8
    TA 300 WTH??
    CYA 30
    CH 150

    I've been using the Pool Calculator, but just wanted to know if you guys had any additional advice..THANKS!!!

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    pwrstrk's Avatar
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    Re: Starting to clean a green pool with algae

    What test kit are you using ?


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Starting to clean a green pool with algae

    The TFT-50.

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    pwrstrk's Avatar
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    Re: Starting to clean a green pool with algae

    When you test for TA did you wipe the tip after each drop with a damp cloth to prevent static electricity. ?


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Starting to clean a green pool with algae

    No I did not, but I'll retest. Thanks!!

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    Re: Starting to clean a green pool with algae

    I think your TA test will be quite bit lower when you wipe the dropper tip but more importantly, are you aware you are not yet treating for algae which you indicated in your first post?

    You do not have NEARLY enough chlorine....you need to SLAM the pool.

    The SLAM process is in pool school and is the correct way to clear an algae pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    UnderWaterVanya's Avatar
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    Re: Starting to clean a green pool with algae

    Did you add anything between those measurements? FC went up by 5?


    - Sent using Tapatalk
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    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
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    Re: Starting to clean a green pool with algae

    Thanks duraleigh..What d oes my FC need to start SLAM process? 14 or so?? Thanks!!

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    Re: Starting to clean a green pool with algae

    .What d oes my FC need to start SLAM process? 14 or so?? Thanks!!
    Yes, you can find that information in the FC/CYA relationship chart in Pool School but 14 is on the money!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Starting to clean a green pool with algae

    Thanks a bunch!

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    Re: Starting to clean a green pool with algae

    Ok friends..I know I need to post specs in signature....but it's a 24' x 54" deep pool. My latest test results are listed below:

    FC 13.0 (Someone told me target is 14 for the SLAM process)
    PH 8.4
    TA 250
    CYA 40
    CH 200
    Outside temperature is 90 degrees.
    The Pool calculator suggests I add 28 oz. of bleach and 62 0z of muratic acid, so I'm in the process of adding that now. Any suggestions
    that I should know about. For the record, since I started this SLAM process yesterday morning, I have added 11 gallons of bleach with suggested muratic acid. The pool started out brown, and now looks like cloudy white/extremely light green. It seems I am making some progress in this aspect. Thanks a lot!!

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    pwrstrk's Avatar
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    Re: Starting to clean a green pool with algae

    Keep slamming.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Starting to clean a green pool with algae

    Thank you..so if I continue to add chlorine and follow SLAM guidelines, will the pool become clear? And if so, can you estimate how many days? I kniow there many conditions that may affect this, just thought I would ask. I appreciate your help!

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    Re: Starting to clean a green pool with algae

    It varies widely but most SLAMs take 4 - 7 days....sometimes longer but usually because folks don't follow the SLAM article precisely.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    UnderWaterVanya's Avatar
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    Re: Starting to clean a green pool with algae

    Don't test pH while FC is above 10ppm. The test will show a falsely high pH. Adjust pH when you are below FC of 10 and assume it is OK until the SLAM is complete.


    - Sent using Tapatalk
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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