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Thread: i know its not algae but.....

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    i know its not algae but.....

    I have to brush or run the robot everyday or i get this yellow/brown dirt (when whisked with brush) everyday, even with solar cover on. If i dont brush in 4 days the deep end is so cloudy you cant see the bottom. Nothing on sides, this is uniformly on shallow end bottom and half way down slope to deep end.

    FC 3
    TA 70
    CYA 50
    CH 290
    PH 7.5

    did drop test, .5 loss ( if that) and no ccs.... One medium size tree next to pool and many large trees with in 100-200 feet. Pollen ? getting on the whole floor and slopes even with cover on?
    17,000 gal inground
    vinyl
    swg
    3hp 8 returns
    heat siphon heat pump

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    Mod Squad JohnT's Avatar
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    Re: i know its not algae but.....

    Cloudiness doesn't really sound like pollen. How long do you run the pump daily?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    pwrstrk's Avatar
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    i know its not algae but.....

    Yea cloudy water usually points to a water chemistry issue.
    Your CYA is a little low for a SWG. The recommended range is 70-80.
    Do you ever see the stuff floating on the surface of the water ? You can use a skimmer sock or nylon knee over your skimmer basket to help filter it out if it's pollen. 😎
    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: i know its not algae but.....

    t this yellow/brown dirt (when whisked with brush) everyday, even with solar cover on
    Sounds precisely like dead algae settling to the bottom......why do you think it is not?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: i know its not algae but.....

    Quote Originally Posted by JohnT View Post
    Cloudiness doesn't really sound like pollen. How long do you run the pump daily?
    about 12 hrs....

    - - - Updated - - -

    Quote Originally Posted by pwrstrk View Post
    Yea cloudy water usually points to a water chemistry issue.
    Your CYA is a little low for a SWG. The recommended range is 70-80.
    Do you ever see the stuff floating on the surface of the water ? You can use a skimmer sock or nylon knee over your skimmer basket to help filter it out if it's pollen. ��
    it really only gets cloudy after i brush the stuff around

    - - - Updated - - -

    Quote Originally Posted by duraleigh View Post
    Sounds precisely like dead algae settling to the bottom......why do you think it is not?
    well..... cause it always passed the drop test? or because its dead the drop test will still be good? . Btw since i type it this, this am. its already back , mildy but back, SO how do i get rid of it?

    thanks guys!
    17,000 gal inground
    vinyl
    swg
    3hp 8 returns
    heat siphon heat pump

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    Mod Squad JohnT's Avatar
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    Re: i know its not algae but.....

    You can kind of get into a stage where you have algae but are killing it as fast as it grows. The symptom is constant brown/yellow "dirt" on the bottom.

    That said, your problem may very well be pollen. Do you get the dirt on top of the cover?

    If it is algae, SLAMing the pool is the answer.

    Your CYA is low for an SWCG, and your chlorine is on the low end. I wonder if your chlorine is dropping below 3ppm in the middle of a sunny day?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    pwrstrk's Avatar
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    Re: i know its not algae but.....

    I think you should be maintaing higher FC levels. I would raise my CYA level to 70 and target FC at 5-6 and never below 3.
    When you touch the stuff does it poof up and disappear ? If it does it's dead algae. 😎
    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: i know its not algae but.....

    Quote Originally Posted by pwrstrk View Post
    I think you should be maintaing higher FC levels. I would raise my CYA level to 70 and target FC at 5-6 and never below 3.
    When you touch the stuff does it poof up and disappear ? If it does it's dead algae. ��
    i have been "tinkering" with the SWG setting this year ( new cell) and 3 is the lowest its been , most of the summer its been around 7 even then i had the dirt. Yes is does poof up and disappear.

    what i dont get is why my over night tests and cc is good. i'll do another drop test tonight.
    17,000 gal inground
    vinyl
    swg
    3hp 8 returns
    heat siphon heat pump

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    pwrstrk's Avatar
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    i know its not algae but.....

    Here's what I would do.
    Tonight bring your FC up to shock level with bleach. Your shock level is 20. Test to make sure it's at shock level. Turn your SWG off and run pump over night. Test in the morning before the sun hits the pool and see if you lost more than 1ppm of FC. If you lose 1ppm or less your good. You also need to have CC of 0.5 or less and crystal clear water. If you don't have all three criteria keep SLAMimg
    You also need to vacuum up the dead algae.
    Then raise your CYA up to 70 and maintain an FC level of 5-6 and don't let it fall below 3.
    Your right on the edge of a full blown algae outbreak IMO. Your chlorine is killing it as it forms now. Maintain higher FC levels and it won't form. 😎
    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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    i know its not algae but.....

    Quote Originally Posted by mikeginder View Post
    i have been "tinkering" with the SWG setting this year ( new cell) and 3 is the lowest its been , most of the summer its been around 7 even then i had the dirt. Yes is does poof up and disappear.

    what i dont get is why my over night tests and cc is good. i'll do another drop test tonight.
    You can't do an overnight chlorine loss test at target FC levels. That test is only intended to be performed during a SLAM where your FC is at shock level. The OCLT is not valid proof being algae free when performed at target level.

    It sounds to me that you are very much on the verge of an algae bloom. You CYA is too low as well as your FC. What output level is your SWG running at?





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    pwrstrk's Avatar
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    Re: i know its not algae but.....

    Plus you have to have your SWG off and pump running to do an OCLT. 😎
    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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