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Thread: Question about damage from copper algaecide

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    Question about damage from copper algaecide

    I have been using the BBB method for several years with good results. I first learned about it on this site. Thanks.

    Recently I hired a guy to vacuum and brush my pool. I did not make it clear to him that was all I wanted him to do and that I wanted to continue doing the chemicals myself. He added some copper based algaecide. We talked and he knows not to add anything more, but the copper based algaecide is alreday in the water.

    What damage will this do and do I need to modify the BBB method in any way going forward? Is it enough of a problem that I need to drain the pool? I really don't want to drain the pool if I don't have to.
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad jblizzle's Avatar
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    Re: Question about damage from copper algaecide

    One dose of copper should not be enough to cause any problems.

    Keep calm and carry on
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Question about damage from copper algaecide

    Now my chlorine tests don't work, and I know there is plenty of chlorine in the water because I just added it.

    When I do the daily test, adding the R-0060 to the water, the water is clear, showing there is no chlorine, but I know there is.

    When I do the drop test and add the R-0870 powder to the water, it doesn't turn nearly as pink as it used to. It is more of a light purple color. This is the first time I am doing the drop test this year and the
    R-0870 powder is over a year old, so maybe that is the problem.

    Does copper mess up chlorine tests, or could it be some other chemical he added that he didn't tell me about?
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad jblizzle's Avatar
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    Re: Question about damage from copper algaecide

    Depends on what all was added to the water. Did you do the CC test? That might show as high.

    Although the yellow OTO test is pretty foolproof.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: Question about damage from copper algaecide

    I used some newer R-0870 powder and the water tests OK. I guess these chemicals do loose potency over time.
    I added more chlorine and the yellow OTO test works.

    I do think something he added effected chlorine testing because I had to put in twice as much as usual to get the yellow OTO test to work. Or maybe there is something growing in the pool eating up the chlorine, or maybe more sunlight is having a bigger effect than I thought. CYA is 40.

    Any idea about any of this would be appreciated.

    Everything seems OK now though. Thanks for your help
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
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    Re: Question about damage from copper algaecide

    I know there are chemicals that can appear as a cc but I would have thought that would show up on the Oto test. At least it sounds like everything is working as expected for now.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Richard320's Avatar
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    Re: Question about damage from copper algaecide

    Some of the real cheap algaecides eat chlorine. Maybe he used more than one type.
    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.
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