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Thread: Alge?

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    Alge?

    The vinyl liner of my pool has developed a coating of material that appears brown against the light blue liner. This
    material brushes off easily, appearing as a cloud of dust particles or small white flakes. The material does not adhear
    to the acrylic swim current benches. The buildup covers the entire vertical surface of the liner down to the swim current benches,
    of course below that I can't see. On the pool bottom, the liner also has buildup adjacent to the swim current benches
    where I would not normally walk and an accumulation where a tension strap creates a ridge in the liner probably when
    the particles settle after falling to the bottom.

    I 'am using a UV sanitizer and Nature 2 beads. Taylor K-1005 kit.
    Last edited by sfsendlesspool; 03-25-2016 at 11:24 AM. Reason: additional information
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

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    Texas Splash's Avatar
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    Re: Alge?

    It's very possible you have algae. Can you post a full set of test results? Preferably from a TF-100 or Taylor K-2006 test kit? Pool store testing is unreliable at best. We'd be glad to help.
    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
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Mod Squad pooldv's Avatar
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    Re: Alge?

    Yes, that sounds like dead algae to me. Maybe you aren't maintaining FC high enough? Or need to bump it up a little above target level for your CYA. Chlorine CYA Chart How are you chlorinating?
    How warm do you keep it?
    Is it covered?
    If it is treated more like a spa it might be better to dose after each use.
    Maybe have a look at this, How do I use Chlorine in my Spa (or pool)?

    If you want to verify that organic material is present you can Perform the Overnight FC Loss Test (OCLT)

    If yes, then is time to SLAM - Shock Level And Maintain
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    Mod Squad pooldv's Avatar
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    Re: Alge?

    After we get rid of the algae it would probably be good to perform a chlorine usage analysis and keep a log for a week or so where you swim, add FC and test every 2-4 hours to see what the chlorine level does. The goal is to make sure that FC never drops below the minimum level for your CYA, Chlorine CYA Chart
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Alge?

    I brushed the liner and shocked the pool. The algae no longer accumulates on the liner, however the particles/flakes apparently have disintegrated to a point where the water is cloudy. My question now is how cloudy is to cloudy? Can I expect any treatment to make the water crystal clear?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

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    Texas Splash's Avatar
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    Re: Alge?

    I would definitely perform a thorough "SLAM" as outlined in the link below. A short shock will not eliminate algae in its entirety. Cloudiness is still indicative of algae still present in the water. If you don't SLAM it completely (pass all 3 SLAM criteria), it will be a vicious cycle back & forth. TFP owners should all have crystal clear water.
    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
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: Alge?

    The pool has become clear as I continue to add bleach to get to between .5 and 1 ppm. Also, I have just done the yearly replacement of my UV sanitizer bulb which could also have contributed to the clearing. Thanks to everyone for your input.
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

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    Re: Alge?

    We're happy to help. As an indoor pool owner, your adjustments are a bit different than the typical outdoor pool, but remember ... for TFP purposes, the SLAM isn't complete unless you pass all 3 SLAM criteria (clear water; CC <.5, and pass the OCLT). Glad to hear the water has improved.
    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
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  9. Back To Top    #9

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    Re: Alge?

    I thought I had successfully eliminated the cloudiness in my pool however the accretion on the liner reappeared and a brushing of the liner increased the cloudiness.

    DSCN3874.jpgDSCN3865.jpg


    I brought up the CL to over 5 ppm for the last two days using Sodium Dichloro-s-triazinetrione Dihydrate. When I remove the filter, a cloud of particles is brought up with it. Before I begin the testing with my recently arrived TF-100 and starting a SLAM, would you recommend using a clarifier? Based on what I've read it should help.
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

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    Mod Squad pooldv's Avatar
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    Re: Alge?

    What is your CYA level? That dichlor adds almost as much CYA as it does chlorine. I use plain bleach to raise FC in my hot tub and pool. I have never used clarifier and can't comment on that.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  11. Back To Top    #11

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    Re: Alge?

    Quote Originally Posted by pooldv View Post
    What is your CYA level? That dichlor adds almost as much CYA as it does chlorine. I use plain bleach to raise FC in my hot tub and pool. I have never used clarifier and can't comment on that.
    My first time determining CYA resulted in a reading of 40. When I tried to do the FAS/DPD chlorine test, I added 30 drops of the R-0871 to the sample before the sample turned clear, however within less than a minute the sample turned back to a pink shade. Adding 2 more drops, cleared the sample but the pink color returned within a minute. I did this 3 times and failed to maintain a clear sample. I realize the first 30 drops indicates 15 ppm however this resulted from adding 13 ozs of the dichlor over a 4 day period in an attempt to clear the cloudiness. Should the sample maintain clarity after adding sufficient drops of R-0871?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

  12. Back To Top    #12
    Mod Squad pooldv's Avatar
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    Re: Alge?

    The first time the sample goes clear the test is complete. 30 drops is the right answer. Was your sample 10ml? Then your FC is 15ppm.

    Here are some reference pics of the CYA test, https://www.taylortechnologies.com/C...P?ContentID=36
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Alge?

    "Was your sample 10ml?" - Yes

    "The first time the sample goes clear the test is complete." To continue to use the sample for the CC test, the instructions say to add 5 drops of R-0003 to the now clear solution and swirl, but the sample had turned back to pink. Can a valid CC test be made using a sample that is not clear before adding the R-0003?

    At what chlorine ppm level is it safe to enter the pool?

    "What is your CYA level?" What does the 40 reading mean for removing the cloudiness from my pool?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

  14. Back To Top    #14
    Mod Squad pooldv's Avatar
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    Re: Alge?

    Try adding a little more powder. Here are more detailed instructions. Pool School - FAS-DPD Chlorine Test

    It is safe to swim when FC is above minimum and below shock level for your CYA, FC/CYA Chart

    Here are some reference pics for the CYA test, https://www.taylortechnologies.com/C...P?ContentID=36
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Alge?

    Between 6/3 and 6/6, I added a total of 13 ozs of Sodium Dichloro-s-triazinetrione Dihydrate. On 6/9 the FAS-DPD FC was 15ppm and the CYA 40. Today I used the pool for the first time since 6/3. Today's test results; FAS-DPD FC 6ppm. CC .5, ph 7.5, CYA 40. The pool is clearer, compare with above pictures.... Should I try SLAM for crystal clear? Should I lower the CYA to 30?
    DSCN3875.jpgDSCN3877.jpg
    Should I try SLAM for crystal clear? Should I lower the CYA to 30?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

  16. Back To Top    #16
    Mod Squad pooldv's Avatar
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    Re: Alge?

    No need to lower CYA, it will lower a few PPM per month on its own. I would do an Overnight Chlorine Loss Test to see if anything is brewing there.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Alge?

    Quote Originally Posted by pooldv View Post
    No need to lower CYA, it will lower a few PPM per month on its own. I would do an Overnight Chlorine Loss Test to see if anything is brewing there.
    I added 4 cups of 8.25% bleach to insure a high enough ppm starting point. Results of OCLT; 15.5 - 14.0 = 1.5. Next step?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

  18. Back To Top    #18
    Mod Squad pooldv's Avatar
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    Re: Alge?

    Two choices since this is indoor and more spa than pool

    Hold FC up around 10 for a couple of days and do the Overnight Chlorine Loss Test again
    or
    SLAM
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  19. Back To Top    #19

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    Re: Alge?

    6/17, 6am FC 10ppm, added 1 cup of bleach after test
    6/18, 6am FC 11.5ppm, added 1 cup of bleach after test
    6/18-6/19 OCLT 16ppm - 12ppm = 4ppm, ph 7.2-7.5, added 2 cups of bleach after test
    6/19 10am FC 18.5ppm, 4pm 16.5ppm, 9pm 17.0ppm
    6/20 5:30am FC 16.0ppm, 8pm FC 15.5ppm
    6/21 6am FC 14.5, 1:30pm 15 minute swim, no change in cloudiness, appears as picture immediately above

    It appears that not using the pool for a couple of days causes the larger particles to sink to the bottom and the pool light (9 inches below the water surface) displays fine particles like a light through fog. After using the pool with the swim current on stirs up the larger particles which can be seen in the light beam, appearing like dust.
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

  20. Back To Top    #20

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    Re: Alge?

    I've had the FC at not less than 10ppm for a week. Latest OCLT's run 1ppm. What do you recommend to get rid of the "dust"?
    Endless Pool Owner, since April 2015, 6 ft by 14 ft , 51 inches deep, 2677 gallons
    AG, indoor; 2 by 4 skylight, always covered with solar pool blanket when not in use, temp at an indicated 85, Taylor K
    Delta EA-4H UV Sanitizer, inline with circulating pump
    Pleatco PWW50L cartridge filter

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