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Thread: Algae take over - need help

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    Algae take over - need help

    Hey guys, I am new poster, semi new to having a pool.... last summer was our first year and it was an uphill battle from the very beginning. I read your forums / information a lot but this is my first time posting. We are trying to get the pool ready for summer and it is seeming overwhelming. I have read the SLAM method but would like some insight as to when I should do what. Here are my test results as of this afternoon:FC - 0CC - 0pH - 6.4TA - 40CH - 100CYA - 0Obviously all need to be addressed but in what order? PH first or CYA first? We did not close the pool properly and struggled to have it clear at the end of last summer. We haven't done anything to the pool except clean out the leaves that we could. The water is green, with very little visibility and I'm embarrassed to say there are tons of TADPOLES.Please help, thank you so much for your wisdom and knowledge!!!
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Mod Squad YippeeSkippy's Avatar
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    Re: Algae take over - need help

    1) Ditch the AquaChek7 "Guess-Strips" and order the TF-100 from either Pool Supply World or TFTestkits.
    Pool Supplies, Spa Supplies and Parts or TFTestkits.net It runs $70ish but will save you TONS of money getting that swamp cleared up.

    2) Drain at least half the water (never all the way, leave a foot or two in at all times to stabilize the liner) and refill.

    3) While waiting for the proper test kit to arrive, keep removing any solid debris in the pool and add 1/2 gallon of liquid bleach (H.E.B. type works) daily just to hold the green at bay a bit till you can really start a SLAM process. If you order from TFTestkit it ships fast from NC.

    4) Start reading Pool School <link at top> and read it again and again. Bring back questions.

    Welcome! Glad to have you here. You'll love your pool if you follow our steps and stay OUT of the pool store. They just will sell you and cause you more problems.
    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

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    Re: Algae take over - need help

    YippeeSkippy - I'm just curious why you are having the OP drain half the water? I quoted and re-formatted their test results below, I think you may have read that CYA was 100 instead of CH.

    Quote Originally Posted by kelleybrown View Post
    FC - 0
    CC - 0
    pH - 6.4
    TA - 40
    CH - 100
    CYA - 0
    It looks like first priority is to increase pH to 7.2, then add 10 FC (using bleach/liquid chlorine) and retest after 10 minutes to see if the FC holds.

    Edited to add the following:
    If more than 50% of FC remains after 10 minutes, you can add enough CYA to get to 30 and proceed with SLAMing your pool. If less than 50% FC remains after 10 minutes, you likely have ammonia, do not add CYA. Post back here and we will give you more instructions.

    Here are a few links to get you started.
    Pool School - PoolMath
    Pool School - Recommended Pool Chemicals
    Pool School - SLAM - Shock Level And Maintain
    11,500 Gal Fiberglass IG Pool. Hayward cartridge filter with Pentair 3/4 HP pump
    500 Gal Fiberglass AG Spa with cartridge filter
    Taylor K-2006 test kit

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    Mod Squad YippeeSkippy's Avatar
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    Re: Algae take over - need help

    oh my gosh, you're right! I misread the CH for CYA. I'm so glad you caught that!!!

    I've sent a message to Kelly.

    Yip <--Pool Forum Guide who needs better eyes
    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

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    Mod Squad YippeeSkippy's Avatar
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    Re: Algae take over - need help

    Kelly, aeh0603 is correct. That pH needs to be addressed STAT.

    Use the PoolMath calculator to determine what to add. It may take repeated doses of washing soda (soda ash) or Borax depending on your TA.

    That low pH can damage the vinyl liner and make it brittle. Make this a priority, 'k?
    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

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    Re: Algae take over - need help

    Nice work, aeh and YS.

    kelleybrown, you are in good hands with these folks. Your task will become very doable if you follow their advice (Please stay OUT of the pool store)
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Algae take over - need help

    Guys, you all are so helpful! Its so overwhelming to try and figure all of this out!! We are in Huntsville TX and have had crazy amounts of rain the past 2 days so i haven't been able to do anything with the pool. We FINALLY have sunshine so I am going to address the PH right now!
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Re: Algae take over - need help

    OK guys, I have added the Borax to increase my PH level, how long do I have to wait to re test my PH? Also, can I immediately add the chlorine to see if it holds for 10 minutes?
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Mod Squad YippeeSkippy's Avatar
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    Re: Algae take over - need help

    15 minutes with the pump on should do it

    Yes, you can next add the chlorine and test in 10 minutes. Let us know how it comes out.
    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

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    Re: Algae take over - need help

    Hey guys, the PH is back in balance and good to go, it held through the night as well. I was slowly adding (sock in the skimmer) stabilizer to get the CYA up......SORRY i just realized you said NOT to do that if the FC doesn't hold. I am going to take the sock OUT, I didn't add much! Yesterday I was confused and thought the TC moving up and holding 50% was what i was after, this AM i re-read this thread and saw that it was the FC.

    The TC held 50% after 10 minutes and even over night but the FC didn't move AT ALL after adding 2 jugs of concentrated 7.89% bleach to the pool (recommended by pool math). Sooooo I'm guessing we have ammonia......
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Re: Algae take over - need help

    Alright guys, I'm so excited to report that thanks to other post on this site I found how to attack ammonia! I have been able to maintain a 10 FC for an hour! Will continue to check this every hour and make sure it stays high! The pool has gone from a dark green to a cloudy light greenish color!!! I'm going to add some DE to sand filter...do I need to vacuum pool out or continue to let chemicals do their job?

    Also when do I address the CYA?

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    Re: Algae take over - need help

    If you're following SLAM, I wouldn't add DE just yet. Keep brushing until you have clear water, less that .5 cc and pass OCLT. Keep water at shock level until all three criteria are met. Keep brushing ! Adding DE should be last step in the process.
    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: Algae take over - need help

    Don't aim too high on the CYA. You can raise it higher for that TX sun after your slam.

    - - - Updated - - -

    Sorry we all missed your post... Holiday weekend and all!

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    Re: Algae take over - need help

    Great job beating the ammonia! Also, I don't remember if anyone had told you yet, but the pH test is not valid when FC is higher than 10 (it reads falsly high). Once you get CYA added, your SLAM level FC will increase so no need to test pH Keep up the good work, you'll be enjoying your pool in no time!
    11,500 Gal Fiberglass IG Pool. Hayward cartridge filter with Pentair 3/4 HP pump
    500 Gal Fiberglass AG Spa with cartridge filter
    Taylor K-2006 test kit

  15. Back To Top    #15

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    Re: Algae take over - need help

    If there is debris in the pool, vacuum.

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    Re: Algae take over - need help

    Good morning everyone, I hope you all had a fabulous Memorial Day, hopefully in clean sparkly pools .

    OK I'm not sure whats going on, I have maintained the chlorine at 10 or higher and we made zero progress yesterday, our pool is still cloudy greenish blue. Sunday night the chlorine dropped from 20 to 5. I immediately brought it up to 10 and maintained that all day. We tried to vacuum the pool, but our vacuum is honestly horrible and gets little to no suction so we tried to get all debris up from the floor of the pool with brush and net. We have a brand new sand pump on the pool and the intake and return pressure is really weak, I'm not sure if that is standard for that type of pump or not.

    I'm not sure what to do next, advice appreciated and needed!
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

  17. Back To Top    #17

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    Re: Algae take over - need help

    Can you post a full set of test results again? I'm mostly curious about CYA.
    11,500 Gal Fiberglass IG Pool. Hayward cartridge filter with Pentair 3/4 HP pump
    500 Gal Fiberglass AG Spa with cartridge filter
    Taylor K-2006 test kit

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    Re: Algae take over - need help

    5/31 11:02am
    Total Hardness 250
    Total Chlorine 10
    Free Chlorine 10
    PH 7.4
    Total Alkalinity 40
    CYA 0
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Re: Algae take over - need help

    Ggggggggrrrrrrr - so frustrated, so for complete disclosure, not sure how much each factor affects the other.... Sunday night the intake was hardly suctioning, we backwashed it after only 48 hours of running, albeit in a very dirty pool. Last night same thing, I backwashed, rinsed, and turned the filter setting back on. I just went out there to double check it and I never opened the intake line back up so the pump ran all night with no water flowing in, I hope it doesn't mess up our brand new pump.

    Don't know how much affect that has had on our pool.
    Kelley Brown - TX12,800 gallon, AG vinyl pool, Silican Sand, SandPRO 75D single speed 3/4 horse, May 2015, Water Test AquaChek7, Well

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    Texas Splash's Avatar
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    Re: Algae take over - need help

    That stinks. Well, if it's still able to turn-on that's a start. That means it didn't seize-up on you. The next question would be warping from the heat and if it caused any leaks. Are you able to start it again? Does it prime and hold water okay?
    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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