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Thread: yellowish green algae

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    Join Date
    Oct 2016
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    Rockville
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    yellowish green algae

    Need help with algae. Yellowish green color. After an opening in May ,upper part of pool where level of the water risen during winter, appear an discoloration of a yellow greenish color. After opening only shade part of the pool affected. Tried evereything - slamming pool, using cleaning stone, antialgae side etc.
    24000 gallons, in ground, salt generator pool,Triton sand filter, 3/4 hp pump.

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    Mod Squad woodyp's Avatar
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    Re: yellowish green algae

    Welcome. Do you have any ACCURATE test results for us to look at? Have one of our recommended test kits?
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    Re: yellowish green algae

    Quote Originally Posted by woodyp View Post
    Welcome. Do you have any ACCURATE test results for us to look at? Have one of our recommended test kits?
    I am trying to post photos but can not proceed.Can you help?
    24000 gallons, in ground, salt generator pool,Triton sand filter, 3/4 hp pump.

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    Re: yellowish green algae

    Quote Originally Posted by vladyasha View Post
    I am trying to post photos but can not proceed.Can you help?
    free chlorine 2
    available chlorine 2
    salt 2700 i know it is low
    calcium hardness 240
    cya 60
    ta 110
    ph 8 need more acid
    copper 0
    iron 0
    phosphate 100
    24000 gallons, in ground, salt generator pool,Triton sand filter, 3/4 hp pump.

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    borjis's Avatar
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    Aug 2014
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    Re: yellowish green algae

    Your free chlorine is too low...do you normally allow it to get to 2?

    At your CYA level, it needs to be around 6 (4 minimum) at all times to prevent algae growth.

    If you do the slam properly and to the letter while brushing daily, it will go away.
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