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Thread: I had sparkling clear water, got caught by an algea bloom, then...

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    jwhop3's Avatar
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    I had sparkling clear water, got caught by an algea bloom, then...

    We had a swimmer party, followed by four days of afternoon thunderstorms that allowed the pool to get away from me a bit. I finally was able to 7.2 my pH and SLAM it, got all the dead stuff out, and have maintained an OCLT of <1.0 for several days. Water is "clear," just what I would call hazy. The only thing I did that is arousing my suspicion is I added a bottle of Frog BAM algaecide. Ever since I did that I have had the haziness.

    My consistent readings have been
    FC 5 - 7ppm
    TC no drop after 5 minutes
    pH 7.6 - 7.8
    AL 110 - 120
    CYA 40

    I am using a Frog in-line chlorinator, but on the minimum setting of 1. Shocking with bleach, pH adjustments with muriatic acid and/or Borax, Arm and Hammer for AL adjustments.

    I am also running the diesel filter through the return jets at night.

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    Richard320's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    FC & TC sounds like you're using something other than the FAS-DPD test to check chlorine. Are you one of the many who was sold the K-2005 DPD test by the pool store with them telling you, "It's the same thing"?

    If so, then you really didn't do the SLAM properly and there may still be some algae stragglers.
    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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    jwhop3's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    I confess the FAS-DPD test is the last step I haven't upgraded to, that is definitely on my list for next year. I have the 5-way test kit, it's probably DPD, I usually check it against test strips just to make sure one or the other isn't lying to me. I know that itself is limiting me.

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    Richard320's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    You can buy just the FAS-DPD TFTestkits.net
    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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    jwhop3's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    Well there you go. I love chemistry! Thanks, Richard!

    - - - Updated - - -

    It does look better this morning. I've been dosing bleach for 7 - 9 ppm, and running the slimebags on both returns. Those girls are the bombs.

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    Mod Squad pooldv's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    Cool underwater selfie!

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    jwhop3's Avatar
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    Re: I had sparkling clear water, got caught by an algea bloom, then...

    Done.

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