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  1. #1
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    Default Re: HELP dealing with mustard algae!

    OK so it took 41 drops to change from pink to clear..... multiply that by 0.5 and then by 2 So FC is 41. pH is 7.4 Water is clear in low end - in deep end I can see bottom but not clear. Algae spots are brownish grey and dissapate into a cloud when brushed. Spots mainly in low end and on edges of bottom of deep end.
    18 x 36 vinyl IG pool; Tagelus sand filter; 3/4HP pump; booster for Pentair cleaner; SWCG, Taylor Test Kit

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    Default Re: HELP dealing with mustard algae!

    Also rechecked just straight pool water sample and got FC 45.5 and CC 0 - after adding R0003 there was little to none color change - did test anyway and it resulted with CC of 2
    18 x 36 vinyl IG pool; Tagelus sand filter; 3/4HP pump; booster for Pentair cleaner; SWCG, Taylor Test Kit

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    Default Re: HELP dealing with mustard algae!

    With FC>40, don't worry about an apparent CC of 2.

    PH is OK; I was concerned.

    Brush and vacuum the pool -- you're in a good place to get rid of mustard algae.

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    Default Re: HELP dealing with mustard algae!

    And put bleach in at night? If it rains, should I add extra bleach?
    Do I need to add anything else? Algae is getting less ...water seems clearer. I don't need to add salt at this point right?
    18 x 36 vinyl IG pool; Tagelus sand filter; 3/4HP pump; booster for Pentair cleaner; SWCG, Taylor Test Kit

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    Default Re: HELP dealing with mustard algae!

    very little algae today and I can see the bottom of the deep end clearly! Feel like I am making progress! Readings after vacuuming pool
    FC 52.0
    CC 0
    pH 7.8
    Ca 110
    TA 140
    How many days of no algae can I start to balance out water so pool can be swam in?
    18 x 36 vinyl IG pool; Tagelus sand filter; 3/4HP pump; booster for Pentair cleaner; SWCG, Taylor Test Kit

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    Default Re: HELP dealing with mustard algae!

    + How long have you had the algae?

    + Have you had problems with this before, in previous seasons? (I haven't re-read your thread -- apologies if you've already answered this)

    + Typically I suggest going 2 - 3 days after ZERO algae appears anywhere. But mustard algae clings to tiny crevices and holes, somewhat like black algae, and then re-emerges. SO you might want to go a little longer.
    Last edited by Watermom; 06-09-2014 at 07:25 PM. Reason: changed "cleans" to "clings"

  7. #7
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    Default Re: HELP dealing with mustard algae!

    Have had algae since 5/27. Took cover off pool and then pump died so pool sat opened without water moving for 8 days. Large amount of leaves in pool and took some time to get them out. Have not had this problem in the past. Really started using just bleach for last 5 days. I do see an improvement...just not completely gone yet. I have been adding 3 jugs of 8.25% bleach nightly and vacuuming in the morning. Does it matter if I brush before or after adding bleach? Please advise what I should do when I finally see no obvious algae - do I continue to bleach for those 2-3 days? This my first season opening pool on my own and feeling somewhat overwhelmed and frustrated. But determined to get it clear and swimable!
    18 x 36 vinyl IG pool; Tagelus sand filter; 3/4HP pump; booster for Pentair cleaner; SWCG, Taylor Test Kit

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