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Thread: Pool green just a few days after cleaning/shocking

  1. #21
    Mod Squad jblizzle's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    The refill is needed due to the CYA ... period. What makes you think you have elevated FC and TA?

    Without posting a full set of results (even the dreaded pool store) it is hard to guess. It is also help to keep track of readings so you can see trends.

    I would order the test kit. Then take a sample to a store and report the results. Then likely start replacing water.

    @techguy ... currently only strips are being used for testing
    Jason, TFP Moderator
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  2. #22
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    Re: Pool green just a few days after cleaning/shocking

    Just got back from the pool store for them to test my water.
    This is what he got:
    FAC 5
    TAC 5
    Ca hardness 250
    CYA 100
    TA 140
    pH 8
    Acid Demand 5
    TDS 700
    Phosphates 300

    CYA is normal high so that's NOT the problem as it originally was thought to be from my crappy test strips.

    The guy at the store tried to sell me a product that decreases phosphates to decrease the amount available for algae to eat but he was confused as to how the algae survived in the first place with a high FAC.

    Any ideas?

  3. #23
    Mod Squad jblizzle's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    that just shows up the pool stores think they know. Your CYA is still double what it should be so you still should probably do a 50 percent drain.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
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  4. #24
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    Re: Pool green just a few days after cleaning/shocking

    Quote Originally Posted by jblizzle
    that just shows up the pool stores think they know. Your CYA is still double what it should be so you still should probably do a 50 percent drain.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    I am in the process of draining 50% of it. I only did 1 hr tonight but will likely finish tomorrow. After I refill what should I do? I was planning on bringing it to the pool store to get it tested again. I suppose I can post the numbers tomorrow and we can go from there?

  5. #25
    Mod Squad jblizzle's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    If the best you can do is the results from theed pool store them that is what you have to work with.

    You would then start the shock process. Read the process in pool school. You should quickly realize that doing out correctly without a test kit is near impossible as the required FC levels are so high.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
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  6. #26
    Senior Member techguy's Avatar
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    Pool green just a few days after cleaning/shocking

    Thanks for catching that JB.

    Its amazing what accurate tests and truthful information will do to resolve the problem.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

  7. #27
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    Re: Pool green just a few days after cleaning/shocking

    llang31ll, while you drain, please post pictures of the areas of your plaster surface that has been breaking off if possible. How big are the pieces? How many? How often? How prevalent is the problem?
    12,000 gallon IG vinyl pool, 1 HP pump, sand filter, TF-100 test kit, Raypak heater. Converted from Bacqa June 2011. Trouble Free ever since.

  8. #28
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    Re: Pool green just a few days after cleaning/shocking

    It is about 50% drained. All the algae is still present at the deep end. Should I do anything about that before I refill it with fresh water? My plan was to fill it all the way then turn on the filter and then shock it. What do you guys think?

  9. #29
    Mod Squad jblizzle's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    Fill it. Check levels. Adjust pH if needed. Start the shock process.

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    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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  10. #30
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    Re: Pool green just a few days after cleaning/shocking

    Quote Originally Posted by MattB
    llang31ll, while you drain, please post pictures of the areas of your plaster surface that has been breaking off if possible. How big are the pieces? How many? How often? How prevalent is the problem?
    Attached is a picture of the area that the plaster is coming off of. It's primarily on the first step only. It's been slowing chipping away over the past 15 years. Each piece is about 2-3 inches wide.
    Attached Images Attached Images

  11. #31
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    Re: Pool green just a few days after cleaning/shocking

    Quote Originally Posted by llang31ll
    Ok so I figured out why my CYA reading is so high- 10 years of using chlorine tablets usually 3-5 at a time. I gather that at this point I should:
    1. Scrub algae off walls and floor
    2. Drain pool by ~90%
    3. Refill
    4. Add Cyanuric Acid (Stabilizer) to ~30ppm
    5. Switch to a non-stabilized chlorine from now on

    How does this sound? Please let me know if I am missing something. Thank you all!
    If getting clean water to refill your pool isnt an issue, I'd suggest replacing all the water.

    I was in the same situation as you are, shocking, brushing, checking my chemistry. I worked my butt off for two months chasing my tail and the pool would clear up a bit, but two days later the algae would bloom again. So I checked my cya, and sure enough, it was well over 100.

  12. #32
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    Re: Pool green just a few days after cleaning/shocking

    The pool is done refilling and now I am going to shock it. I have chlorinating liquid of 10% sodium hypochlorite and packets of "shock treatment" that contain 53.5% of trichloro. Which should I use? Is it true trichloro has CYA in it? If so should I avoid it since my CYA Is currently in normal range and I don't want to up it again.
    FC is at 1 and I want to bring it to 17 according to the CYA-FC chart

  13. #33
    Mod Squad Butterfly's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    Quote Originally Posted by llang31ll
    The pool is done refilling and now I am going to shock it. I have chlorinating liquid of 10% sodium hypochlorite and packets of "shock treatment" that contain 53.5% of trichloro. Which should I use?
    We recommend bleach/liquid chlorine.

    Is it true trichloro has CYA in it? Yes

    If so should I avoid it since my CYA Is currently in normal range and I don't want to up it again.Yes

    FC is at 1 and I want to bring it to 17 according to the CYA-FC chart
    We need to know the CYA test result to confirm this with you.
    TFP Moderator -TF100 Test Kit - TF100 TestKit YouTube Channel- PoolMath- Pool School -
    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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  14. #34
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    Re: Pool green just a few days after cleaning/shocking

    Is there a FAS-DPD titration test by itself that I can buy without the other stuff? I did a quick Google search and it seems as though they only come in kits.

  15. #35
    Mod Squad Bama Rambler's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    You can buy just a FAS-DPD kit or even the individual parts of the kit in case you don't need the vial or scoop. See the link for Tftestkits in my or BF's sig.
    Dave J. TFP Moderator
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    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  16. #36
    Mod Squad jblizzle's Avatar
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    Re: Pool green just a few days after cleaning/shocking

    Are you able to test the CYA yourself already? Because that seems to be one that the pool stores struggle with ... saying there is CYA in water that 100% does NOT have any in it ... or showing lower levels than reality ... it is just a **** shoot.

    If you do not have that capability, you should just get the K-2006 or TF-100 to have all the required tests.
    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, Dolphin Diagnostic Robotic Cleaner, TF-100 test kit w/ SpeedStir
    Gone: Hayward RS1500 pump, undersized DIY solar heater, Dolphin Dynamic Robotic Cleaner
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL

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