Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Mustard Algae will be the death of me!!

  1. Back To Top    #1
    deesha23's Avatar
    Join Date
    Jul 2012
    Location
    Southern Oklahoma
    Posts
    31

    Mustard Algae will be the death of me!!

    So I have posted on here before, but it was a couple of years ago. With all of the help I received here I have been able to manage and maintain a crystal clear pool until the last couple of weeks. This summer I have strayed from what I learned here and due to "too much on my plate" I have been entrusting the care of my pool to a local pool service. Yes, I knew this was a mistake and yet chose this path anyway. Now I am finding myself dealing with a green pool, with what appears to be mustard algae, and I need HELP!!! I have removed and locked away any remaining chlorine pucks. I have been testing and dumping bleach in after dropping pH with MA to 7.2-7.4. The pool water is now a turquoise color, very cloudy, with visibility only about 12-18 inches. I have been trying to brush the bottom and sides every hour or so but my real dilemma is that I can not see the bottom to know where to concentrate brushing efforts. Not to mention, any leaves or debris that may be there. So my question is, if I continue down this path, will the water eventually clear enough to allow me to do a better job of cleaning the bottom? I did just find that one of my lines had a good size leaf clog and was able to evacuate that with the pump pressure and valves. Hoping this helps....any other advice??
    Southern Oklahoma, 35,000 gallons, Sand filter, Inground, Vinyl liner, 20 year old pool, First time pool owner

  2. Back To Top    #2
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,479

    Re: Mustard Algae will be the death of me!!

    Got some test results?

    How did you decide it was mustard algae versus regular old algae?
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  3. Back To Top    #3
    deesha23's Avatar
    Join Date
    Jul 2012
    Location
    Southern Oklahoma
    Posts
    31

    Re: Mustard Algae will be the death of me!!

    I do have test results!

    Started with:
    FC - 1
    CC - .5
    pH - 8.2
    CYA - 80

    Dumped in 120 oz. MA and 480 oz. of 6% Bleach

    Next results:
    FC - 23
    CC - 1
    pH - 7.6
    CYA - 80

    Dumped 120oz. MA and gradually 240 oz. Bleach

    Latest results:
    FC - 23
    CC - 0.5
    pH - 7.3
    CYA - 80

    - - - Updated - - -

    My "mustard algae" conclusion is based on the yellow green clouds that come up every time I brush. Is there a better way to know for sure what kind of algae?
    Southern Oklahoma, 35,000 gallons, Sand filter, Inground, Vinyl liner, 20 year old pool, First time pool owner

  4. Back To Top    #4

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: Mustard Algae will be the death of me!!

    While I wouldn't rule out mustard algae as a possibility everything you describe just sounds like a run of the mill algae bloom. Unless you finish this and notice a regrowth of yellow algae then it is just regular algae. It sounds like you are SLAMing well, just keep it up and let the filter clear the dead algae out of the water. It will take some time but it will clear.

    One problem, possibly a major problem, is you are adjusting your pH during a SLAM. The pH test does not work correctly at SLAM levels, it often reads high. Couple that with the chlorine raising your pH temporarily and you are probably going to find your pH bottoming out when you finish your SLAM. Don't test for or adjust it any more until you get your FC back down under 10.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  5. Back To Top    #5
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,479

    Re: Mustard Algae will be the death of me!!

    Do you have a salt water generator (SWG) and is that why your CYA is so high at 80?

    Ok, check out these links- Pool School - Mustard Algae

    and this one in particular as it has the mustard algae FC requirement if you do end up needing it- Chlorine/CYA Chart
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  6. Back To Top    #6
    deesha23's Avatar
    Join Date
    Jul 2012
    Location
    Southern Oklahoma
    Posts
    31

    Re: Mustard Algae will be the death of me!!

    Ok will do! Here are a couple of pics the way the water looks now. Not sure why my steps are so yellow, but hoping to correct that after water is clear.

    pool Aug 30.jpg
    pool Aug 30-2.jpg

    - - - Updated - - -

    No SWG My CYA is so high because the pool company was using pucks and shock and the pool just kept getting greener. I plan on doing partial drain before closing pool in a month or so, was just hoping to get a couple of more weeks for kids to swim first.
    Southern Oklahoma, 35,000 gallons, Sand filter, Inground, Vinyl liner, 20 year old pool, First time pool owner

  7. Back To Top    #7


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: Mustard Algae will be the death of me!!

    I strongly suggest that you replace some water to get your CYA lower. SLAMing with a CYA of 80 is expensive and time consuming.

    Once you replace some water and get further along in your SLAM, I suggest adding some DE to help clear the water faster since sand filters take longer to clean a swamp.

    Adding DE to a sand filter:
    Pool School - Add DE to a Sand Filter
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

  8. Back To Top    #8
    deesha23's Avatar
    Join Date
    Jul 2012
    Location
    Southern Oklahoma
    Posts
    31

    Re: Mustard Algae will be the death of me!!

    Thanks for the suggestion! I didn't know DE could be added to a sand filter, I may try that!

    Southern Oklahoma, 35,000 gallons, Sand filter, Inground, Vinyl liner, 20 year old pool, First time pool owner

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •