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Thread: Stable TFP all of the sudden cloudy and greenish

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    Northern Vermont
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    Stable TFP all of the sudden cloudy and greenish

    Hi folks,

    I am a 7+ year TFP user ... I love you guys! You have saved me tons of money and helped me help the whole neighborhood switch to @ home pool management. I know I'm responsible for at least 3 TF-100 Test kit sales, so I have the economic proof that I preach the gospel.

    The problem I could use your insight on:

    Pool is cloudy and green-ish despite numbers all being stable. Well, stable except after a lot of rain my TA dropped to 40 which has never happened before. As soon as I realized it I corrected the problem. Now after 1 week I am still looking at a cloudy pool.

    Here are my numbers/pool specs:

    IG Vinyl 25,000
    FC:7
    CC:0
    TA:70
    PH: 7.2
    CYA: 55-60

    In full confession, I have for years used a non polyquat algicide adding 1-2 Tablespoons a week during our short Vermont pool season. With the stable chlorine & green pool I added about a half cup thinking that would clear the problem, but as you can see below it didn't.

    Aside from vacuuming the pool, cleaning the filters, and keeping check on the chemicals, any other thoughts on what might be at issue?

    Thanks so much in advance for all of your assistance!

    -Backyardchemist
    25,000 Gallon, IG, vinyl, Pentair Whisperflo WFDS-24 (2-speed), 8 Rainbow M Series cartridge filters, unheated

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    Texas Splash's Avatar
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    Re: Stable TFP all of the sudden cloudy and greenish

    Well, honestly, the info you stated indicates a SLAM. The rain won't have much effect on anything. It's simply a matter of your FC not keeping-up with the CYA - at least at some point. True, an FC of 7 is the target for a CYA of 60, but perhaps at some point it fell low enough (just long enough) to let the cloudiness take-hold. It doesn't take much in the summer. I would recommend a Pool School - SLAM - Shock Level And Maintain until you pass all 3 SLAM criteria. Make sure read ALL te directions on that page. No skipping anything.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  3. Back To Top    #3

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    Re: Stable TFP all of the sudden cloudy and greenish

    Overdosing an algaecide or a clarifier can cloud a pool so you probably ended up making the problem worse. If the algaecide were Polyquat, then that is a mild clarifier itself so probably would have helped clear the pool. What algaecide did you use exactly?

    If you've got any algae (i.e. if that is what is green or part of the cloudiness) then a SLAM is in order to kill it off completely. Then brushing and circulation/filtration. Hopefully the chemical overdosing didn't create a colloid in the pool (i.e. similar to milk) or you'll have a heck of a time getting rid of that in any filter without careful coagulation.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Stable TFP all of the sudden cloudy and greenish

    Thanks Texas Splash & chem geek. I'll admit ... it's been a so long since I've had to address something like this, when last I looked a SLAM was simply still referred to as a shock.

    So you have it, here's the algaecide I used:IMG_2107 (2).JPG

    Also, I agree, following ALL of the steps will save me headaches later. Off to put two more gallons of chlorine in the pool! Thanks for your feedback.

    -BYC
    25,000 Gallon, IG, vinyl, Pentair Whisperflo WFDS-24 (2-speed), 8 Rainbow M Series cartridge filters, unheated

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    Re: Stable TFP all of the sudden cloudy and greenish

    That's ADBAC which is a standard linear quat algaecide. It can cause foaming and overdosing could cloud the water. It also increases chlorine demand since it gets oxidized by chlorine faster than Polyquat.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Stable TFP all of the sudden cloudy and greenish

    "Make sure read ALL the directions on that page. No skipping anything. "

    Just sending along an update ... I'm back on track. FC is stable at shock level @19 with no overnight loss. Looking bluer already,BUT point taken. Cleaning filters/vacuuming/testing daily. Hopefully we'll be back to normal by the weekend.

    That said, I've never really known what a safe FC level is for swimming. If pool is clear and stable at what FC level can we go in?

    Thanks for all your help!

    -Backyardchemist
    25,000 Gallon, IG, vinyl, Pentair Whisperflo WFDS-24 (2-speed), 8 Rainbow M Series cartridge filters, unheated

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    Re: Stable TFP all of the sudden cloudy and greenish

    Anything above the minimum and under the SLAM level for your CYA, is considered safe for swimming.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Mod Squad kimkats's Avatar
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    Re: Stable TFP all of the sudden cloudy and greenish

    Pool School - Chlorine / CYA Chart

    Using this chart will tell you when it is safe to swim.............just a tiny bit under SLAM level is safe to swim!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: Stable TFP all of the sudden cloudy and greenish

    I'm a big fan of the swim-n-slam. Much easier (and cooler) to brush the pool while IN the pool!
    TFP Moderator
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    Re: Stable TFP all of the sudden cloudy and greenish

    @ Pooldv: "Much easier (and cooler) to brush the pool while IN the pool!"

    Brilliant! I will vacuum with my suit on this afternoon! Have a good weekend all ... I can see the skim drain in the deep end clearly this morning so all is right in the backyard again.

    -Backyardchemist
    25,000 Gallon, IG, vinyl, Pentair Whisperflo WFDS-24 (2-speed), 8 Rainbow M Series cartridge filters, unheated

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    Mod Squad tim5055's Avatar
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    Re: Stable TFP all of the sudden cloudy and greenish

    Quote Originally Posted by pooldv View Post
    I'm a big fan of the swim-n-slam. Much easier (and cooler) to brush the pool while IN the pool!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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