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Thread: Hoping this is not algae again!

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    skydiva44's Avatar
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    Hoping this is not algae again!

    I just noticed some "dirt" at the bottom and I am hoping that is all it is, a little paranoid about getting algae again. I will do the overnight test tonight, but until then here are my numbers.

    cc=5
    fc=5
    ph=7.8
    ta=140
    cya=60
    fas-dpd- 14.5

    Is doing the overnight test the only way to decipher if it is dirt or algae? It really does look just like dirt, not green or anything....just wishful thinking!
    ABG Easy Set 18 x 48
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    Re: Hoping this is not algae again!

    Mustard algae can sometimes take the appearance of a gritty brown dirt. Vacuum it out and if it comes back it is probably algae
    -Kevin
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    reebok's Avatar
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    Re: Hoping this is not algae again!

    what does fas-dpd 14.5 mean?
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

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    dmanb2b's Avatar
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    Re: Hoping this is not algae again!

    is your CC really 5 ? Or is that a typo?
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    frustratedpoolmom's Avatar
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    Re: Hoping this is not algae again!

    Please clarify your chlorine test results, something isn't right.

    When in doubt, do an overnight loss test with the SWG off. If you lose more than 1ppm you have organics and should shock.
    Helpful links: Pool School; CYA/Chlorine Chart
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    Re: Hoping this is not algae again!

    ok...with the test kit I have you can test (yellow reagent bottles)the fc and tc, each one was 5 or above since that is as high as the reader goes, so then you subtract 5-5=TC 0, is that not right? That is how I have been doing it..

    FAS-DPD - 29 x .5=14.5 Please don't tell me I have been doing that wrong too! Just when I thought I had it all figured out! lol
    ABG Easy Set 18 x 48
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    dmanb2b's Avatar
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    Re: Hoping this is not algae again!

    ok so your FC is 14.5...why not measure CC with the FAS_DPD while your at it? You can not measure CC with the yellow OTO test...TC=FC+CC
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Mod Squad Bama Rambler's Avatar
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    Re: Hoping this is not algae again!

    Just a thought.
    FAS-DPD - 29 x .5=14.5 Please don't tell me I have been doing that wrong too! Just when I thought I had it all figured out! lol
    Are you using the 10ml fill or the 25ml fill? If your using the 25ml fill you multiply the drops by .2 so that would make the result (29*.2=5.8) closer to your other test.
    Dave J. TFP Moderator
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    Re: Hoping this is not algae again!

    ok I tested it again and now it is 32 x .5 = 16, I added the other drops and it turned just a slight pink, then I had to add only 1 drop to bring it back to clear, so 1 x.5=.5 right? So this would be my CC reading?
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    dmanb2b's Avatar
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    Re: Hoping this is not algae again!

    you got it if you are using a 10ml sample...are you?
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    skydiva44's Avatar
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    Re: Hoping this is not algae again!

    yes
    ABG Easy Set 18 x 48
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    Re: Hoping this is not algae again!

    Your FC level is very high, either on purpose? or simply because you are probably running the SWG too much....refer to the CYA chart for SWG to see what your levels should be. You can probably run your SWG a lot less than you are, what is your run time? Your pump can operate without the SWG on, can it not?

    The yellow OTO test, is just a good daily "quick" check to see if chlorine is present. Since it only goes up to 5 and checks Total Chlorine, it's not very useful other than to see if chlorine is present.

    For more specific results, just rely on the FAS-DPD test.

    I doubt, if your FC has been maintained this high for the last several weeks that what you are seeing is algae. If you want to do an overnight test to be sure, that's fine.

    Then I would leave the SWG off tomorrow to let the FC drop down to your normal range. You'll need to experiment with the SWG run time to find the right setting. There should be no reason for you to keep the FC that high.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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    Re: Hoping this is not algae again!

    yes I have been running the SWG everyday for 6 hours, which is what is recommended when the temps are as high as they are here in Houston. I will turn it off, vacuum and leave my pump running for a few days and check it again in a couple of days....I'm feeling better already!

    BTW FPM...this is off topic, but your Shih Tzu is adorable!
    ABG Easy Set 18 x 48
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    frustratedpoolmom's Avatar
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    Re: Hoping this is not algae again!

    Your's too. I always wanted ones that color but it was never "meant to be". Bandit is my second one, and a replica of the first (different personality of course. )
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    skydiva44's Avatar
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    Re: Hoping this is not algae again!

    It was just dirt....and my pool is sparkling clean! But if feels like a hot tub with the tempatures we are having....109 heat index! Ugh!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    Re: Hoping this is not algae again!

    Quote Originally Posted by skydiva44
    It was just dirt....and my pool is sparkling clean! But if feels like a hot tub with the tempatures we are having....109 heat index! Ugh!
    I have been keeping my pool cool by running the waterfall at 7 AM when the air temp is 72 degrees. If you have a fountain or waterfall or any other way to get a lot of air/water contact in the cool hours (5AM to 8-ish) and stop that during the hot hours (9 AM to 3AM) you can affect the overall temp of the pool. (Though I do run the waterfall for a few minutes mid day to keep it chlorinated, not enough to affect pool temp.)

    The weather site Weather underground shows links to weather stations all over town, many of which have daily temp charts so you can see what the actual low temp time is at this time of year.

    I figure I can reverse this process when it gets cool to add heat to the pool in the fall and winter by running the waterfall only when the rocks are good and hot.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    skydiva44's Avatar
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    Re: Hoping this is not algae again!

    Thanks for the information, I have an above ground pool, so no fancy waterfalls..lol That is an interesting process though and I see we are neighbors, I live in the Spring area...thanks again!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

  18. Back To Top    #18
    skydiva44's Avatar
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    Is my ph and TA the only problem here?

    Topics Merged for Consistency by Moderator

    Last nights numbers:

    PH - 8.2
    TA-140
    CYA-70
    FAS-DPD- FC-22 x.5=11
    CC- 0 - added drops and no change to color

    This morning:
    PH-8.2
    TA 180
    CYA- 60
    FAS-DPD - 50 x .5=25
    CC - 0 - added drops and no change to color


    Last night PS said to add bleach which I did and some acid. So I should be focusing on dropping the PH today...Just want to be sure I am doing this right..thanks!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    Re: Is my ph and TA the only problem here?

    Your FC is high so your pH will read falsely high. Let it drop below 10 ppm and recheck pH.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
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    Mod Squad Bama Rambler's Avatar
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    Re: Is my ph and TA the only problem here?

    I'd have to say that your FC is way too high since you're not seeing any CC's. Unless the overnight chlorine drop test said you needed to shock. Why are you keeping your FC so high?

    With your CYA 70 your FC target is 5-10ppm. I'd not add any more chlorine until it gets to about 6 or 7. Unless you're shocking.

    High FC will affect the pH reading but you said you've already added acid to bring it down. How much did you add?

    I don't think your TA is a problem and that's something you can work on once all your other numbers are in line.

    Oops, I see you have an SWG. Have you read the Pool School section about maintaining a pool with an SWG? If not please do. If so Please read it again.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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