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Thread: Kind of Cloudy

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    Kind of Cloudy

    New to forum, have always used BBB method and poolcalculator.
    Have had pool for 4 years...never had any difficulty.
    Pump went out last weekend, replaced on last Saturday.
    Shocked pool with 8 Gals of Clorox Pro Outdoor bleach (mistake?)
    Have ran pump non stop all week.
    Pool still kind of cloudy...CANT GET THAT SPARKLING CLEAR BACK
    FC - 10
    CC - 0
    CYA - 70
    PH - 7.8
    TA - 140
    I'm very frustrated...
    20x40 vinyl pool
    8' circular 900 Gal spill over spa
    SWG
    1.95 Pump
    84 degrees

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    JasonLion's Avatar
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    Re: Kind of Cloudy

    Welcome to TFP!

    With CYA at 70, shock level is 20-28.

    Outdoor bleach is not as strong as regular bleach and it also has additives (thickening agents and detergents) that you don't really want to put in the pool.

    Have you dona an overnight FC loss test? How has the filter been behaving?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Re: Kind of Cloudy

    I've never done an overnight FC loss test...how do I do that?
    I have a sand filter; seems to be fine...not sure what you mean.
    20x40 vinyl pool
    8' circular 900 Gal spill over spa
    SWG
    1.95 Pump
    84 degrees

  4. Back To Top    #4
    JasonLion's Avatar
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    Re: Kind of Cloudy

    The overnight FC loss test will tell you if you have killed all the algae yet or not. There are basically two possibilities, either you haven't added enough chlorine, and there is algae still growing in your pool, or you have killed all of the algae and there is some problem with your filter not removing the dead algae from the pool.

    When you have a major algae bloom the filter pressure normally goes up fairly quickly and the filter needs to be backwashed every few days. If you haven't needed to backwash the filter it might indicate that there is something wrong with either the filter or the main valve.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5

    Re: Kind of Cloudy

    I will try the overnight FC loss test and go from there.
    I have backwashed once this week, though will do it again.
    When I did backwash it was very dirty, so I think my filter is working...
    Will let you know in the morning,
    Thanks
    20x40 vinyl pool
    8' circular 900 Gal spill over spa
    SWG
    1.95 Pump
    84 degrees

  6. Back To Top    #6

    Re: Kind of Cloudy

    Did the FC drop test...It dropped from 10 down to 4 overnight.
    I shocked with Bleach at 6:00 am to bring it up to 23.
    When should I start seeing a difference? It is not getting any better and its 6 and a half hours later...
    20x40 vinyl pool
    8' circular 900 Gal spill over spa
    SWG
    1.95 Pump
    84 degrees

  7. Back To Top    #7

    Re: Kind of Cloudy

    Also, my filter pressure is fine(17). I backwashed lastnight.
    How do I know if my filter needs cleaning?
    20x40 vinyl pool
    8' circular 900 Gal spill over spa
    SWG
    1.95 Pump
    84 degrees

  8. Back To Top    #8
    Mod Squad Bama Rambler's Avatar
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    Re: Kind of Cloudy

    You've only been shocking 6½ hours. Give it some time. It may take a day or two to see a big difference. You also need to test and add every hour in the beginning.

    You only need to clean the filter when the pressure rises 6 to 10 psi above normal.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Join Date
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    Re: Kind of Cloudy

    It's important to keep your FC up to or very close to shock level until you pass the overnight test. Doing this will make the process move along faster.
    18x36 Vinyl In-ground w/roman ends 27,400G, Hayward 3/4hp with 300# sand filter. Hayward heat pump heater

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    Butterfly's Avatar
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    Re: Kind of Cloudy

    Quote Originally Posted by Arrownelson
    Also, my filter pressure is fine(17). I backwashed lastnight.
    How do I know if my filter needs cleaning?
    As long as you are confident the gauge is working properly....... then when filter pressure increases about 8 psi above the clean filter pressure, it's time to backwash.

    I don't personally wait that long. Usually I backwash at an increase of 3 or 4, but that is just my preference.
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    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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