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Thread: FINALLY figured out I have Mustard Algae!

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    FINALLY figured out I have Mustard Algae!

    When I started the TFPC method it was because I was being pool stored and had thrown so many dollars into my pool because I had what I thought was plain old algae. I did my research and slammed my pool only for the algae to return 9 days after finishing the slam so I slammed it again. I don't know why on earth it didn't dawn on me at that time that it must be mustard algae but it didn't. DUH! Now here I sit 9 days after finishing my last slam with the revelation that I have the dreaded mustard algae. Grrr! I am totally onboard with the TFPC method and know that I am just still dealing with a previous problem. Here's my questions: 1. I had planned on people coming to swim on both Saturday and Tuesday so could I just brush and vacuum everyday until Tuesday afternoon and then begin my slam? I am embarrassed as all get out of the algae problem because I keep a super clean pool and always get so many compliments on it so I really don't want to be in the middle of a slam when they come. 2. When I do begin the slam process I know it is safe to swim in but what about the 24 hours after the slam when I bring the FC up to mustard shock level? I am assuming for sure that I can get in since it says to be brushing everything and vacuuming so much but what about my 8 year old kiddo?

    Thank you all so much!
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    borjis's Avatar
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    Re: FINALLY figured out I have Mustard Algae!

    I had a mustard battle last year.

    It showed up on the pool wall by the entry steps...yellowish color, scrubbed and huge clouds mixed into the water.

    I knew what I had to do but chose to put it off til the next week which I had off from work (perfect time to slam)

    So I maintained the chlorine levels for my cya and had guests over that weekend.

    aka you should be ok to do that.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Re: FINALLY figured out I have Mustard Algae!

    Awesome! Thank you so much! Any ideas about my kiddo swimming when the levels are mustard shock for the 24 hours? I gotta feeling it wouldn't be a good idea but want to be sure before relaying that news. LOL!
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    When you start the slam, you will be brushing the entire surface daily to break up any protection layer
    on the algae and getting dead spores off the surface, while running the pump 24/7 to clear the white
    clouds of dead algae that will come off. You keep the shock levels up and pump running til it's over.

    It's not recommended to swim during this time.

    Once the slam is done (meets the criteria of clear water, no overnight chlorine loss beyond .5 and
    combined chlorine of .5 or less) and the free chlorine level dips below shock value, then swimming can resume.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Re: FINALLY figured out I have Mustard Algae!

    First things first. Not to doubt you but do you have a pic or a really good description of your mustard algae? There is no point talking about it unless you are definitive about it.....almopst 90% of algae is misdiagnosed.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: FINALLY figured out I have Mustard Algae!

    borjis - I had read on here somewhere that it is safe to swim up to shock level. YIKES! We were swimming the whole time I was slamming before.

    duraleigh - I just went out and took some pictures. Luckily I haven't vacuumed or brushed yet today. I did yesterday so this is one day worth of growth.

    Here is the link where I uploaded them to photo bucket. Feel free to let me know what you think. The hose picture is my over the wall mount skimmer. There are wrinkles in the bottom that I plan on fixing in the spring. http://s1067.photobucket.com/user/Gi...mer/slideshow/
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    I found it. Here's where I read that it was safe to swim up to shock level and if you can see the bottom. SLAM questions
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    Quote Originally Posted by borjis View Post
    ...It's not recommended to swim during this time...
    only for safety reasons when you can't see the bottom on deep end due to cloudiness, not because of FC level.

    - - - Updated - - -

    Quote Originally Posted by GinaLovesSummer View Post
    I found it. Here's where I read that it was safe to swim up to shock level and if you can see the bottom. SLAM questions
    do you pass OCLT now? It could very well be just a normal algae.
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    Re: FINALLY figured out I have Mustard Algae!

    Hi, Gina,

    I do not think that is mustard algae. I think it is simply regular dead algae. Mustard algae shows as a smooth, even, yellowish layer on the floors and most always the walls. You show clumps gathered in the bottom of the pool and that color and it's clumping habit is most always dead algae.

    SLAM your pool. You must, brush, vacuum and keep the chlorine at SLAM value until your pool is crystal clear and you can pass the OCLT
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: FINALLY figured out I have Mustard Algae!

    I wonder why it keeps coming back. Both times that I slammed I was very careful to follow the directions. I brushed, vacuumed, skimmed, kept it at slam level until everything passed. I will do an OCLT tonight and in the morning and report back. In the meantime, if anyone has any ideas on why it keeps coming back I would love to hear your feedback. I run my pump a minimum of 11 hours a day. Thanks for all of your help.

    - - - Updated - - -

    And of coarse during a slam I run it 24/7.
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    Can you post a set of test results?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: FINALLY figured out I have Mustard Algae!

    Sure.
    These are from this morning.

    FC - 6.0 (added 80 oz 10% bleach to raise it back to 11)
    CC - 0.5
    PH - 7.8 (added 14 oz muriatic acid to bring it back down to 7.5)
    TA - 120
    CYA - 80 (gonna lower that next spring)
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    Quote Originally Posted by GinaLovesSummer View Post
    I wonder why it keeps coming back. Both times that I slammed I was very careful to follow the directions. I brushed, vacuumed, skimmed, kept it at slam level until everything passed. I will do an OCLT tonight and in the morning and report back. In the meantime, if anyone has any ideas on why it keeps coming back I would love to hear your feedback. I run my pump a minimum of 11 hours a day. Thanks for all of your help.

    - - - Updated - - -

    And of coarse during a slam I run it 24/7.
    please pay very close attention to CYA test as it is basis for the target FC level. We had multiple members reading it too low and then having similar problems
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    Re: FINALLY figured out I have Mustard Algae!

    Quote Originally Posted by max2k View Post
    only for safety reasons when you can't see the bottom on deep end due to cloudiness, not because of FC level.
    um I didn't say that...
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Re: FINALLY figured out I have Mustard Algae!

    We generally advise that it is safe to swim up to shock level for your CYA

    Gina,

    I'm in agreement with Dave that it looks like regular algae. Why does it come back? ........How do you chlorinate? 6FC is minimum with a CYA of 80. I suspect at some point it has dropped below minimum which opens the door for the algae party.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: FINALLY figured out I have Mustard Algae!

    Quote Originally Posted by borjis View Post
    um I didn't say that...
    no, I did- otherwise your statement was against commonly accepted practice here: other members enjoyed their pools during SLAM just fine, you don't need to put pool out of service for SLAM.
    This is provided of course the previous history was sensible. I'm not suggesting to swim in pure swamp which was neglected for years- God knows what might be living there.
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    Re: FINALLY figured out I have Mustard Algae!

    Hmmm...max2k - you've got a point! That darned black dot can play tricks. I have more R-0013 cyanuric acid reagent coming tomorrow. I will retest and see what I get tomorrow. AimeeH - I double checked my pool testing log and sure enough it looks like my chlorine dipped down to 4.0 one day and 4.5 two days. So in the words of AimeeH I've got myself an algae party! Lol! Thank you all so much I bet one or even both is the culprit. I will update tomorrow once my new reagent shows up. I feel so much better now at knowing what happened.
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    One more question. My buddies have a pool too and my husband made the observation that the first time my chlorine dipped low was the day after they swam at our house and their kiddo brings pool toys with him. I know for sure that they have an algae problem because I was watching their house and pool while they went out of town. Should I bump up the chlorine level when they come in the future and if so how much? Or should I have a new rule that all pool toys from outside sources roll through bleach with diluted water solution? Hoping I could just bump up the FC so that I can be discreet and not hurt feelings. They are being pool stored and I can't convince them to see the light on the TFPC ways.
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: FINALLY figured out I have Mustard Algae!

    Quote Originally Posted by GinaLovesSummer View Post
    One more question. My buddies have a pool too and my husband made the observation that the first time my chlorine dipped low was the day after they swam at our house and their kiddo brings pool toys with him. I know for sure that they have an algae problem because I was watching their house and pool while they went out of town. Should I bump up the chlorine level when they come in the future and if so how much? Or should I have a new rule that all pool toys from outside sources roll through bleach with diluted water solution? Hoping I could just bump up the FC so that I can be discreet and not hurt feelings. They are being pool stored and I can't convince them to see the light on the TFPC ways.
    wow, sounds like religion related dispute Would they refuse even try? Anyway- just bump FC by 2 ppm after the party and I'm sure nothing will survive.
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

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    Re: FINALLY figured out I have Mustard Algae!

    Gina,

    Yeah.....id bump chlorine up before friends swim. And unless you lower your CYA, I'd aim for higher maintenance levels than those that invited algae.

    Pool School - Chlorine / CYA Chart

    And how are you chlorinating in general?
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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