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Thread: Stubborn Algae

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    Join Date
    Aug 2014
    Location
    Florissant, MO
    Posts
    7

    Stubborn Algae


    I've been a pool owner for many years, but this year I seem to have green algae that I can't get rid of for more than a week or so. I've used small reagent kits and aquachek test strips. After reading on your site, I bought a Taylor K2006 test kit. I feel I need to SLAM it but probably need to do a 50% replacement of water since my CYA is so high (my test strips say it is about 50 but the Taylor kit shows about 140). Am I on the right track?

    Yesterday:
    Water clarity - clear but not sparkling (dull)
    Water temp - 82
    FC - 4.5
    CC - .5
    PH - 7.0
    TA - 60
    CH - 100
    CYA - 140
    Phosphates - 500

    I added some PH+, Phosphate remover,
    & Algaecide 60, vacuumed & brushed
    pool (small amount of green algae)

    Today:
    Water clarity & temp - same
    FC - 1.0
    CC - .4
    PH - 7.2
    TA, CH, & CYA - same
    Phosphates - 200

    Vacuumed pool (small amount of green algae)
    1998 Doughboy 16x28x3.5 Oval AG pool (10,300 gallons)
    Hayward Power Flo Matrix pump w/single speed-1 hp motor & Hayward EC-50 DE Filter
    Use Aqua-Check Reg & Salt Test Strips / Taylor K-2006 & TF100 / Speedster Magnetic Stirrer
    Just added Intex SWG w/ECO 8110 (15000 gallon) Pool owner since 1978.

  2. Back To Top    #2

    Join Date
    Jul 2014
    Location
    Bastrop, Louisiana
    Posts
    199

    Re: Stubborn Algae

    This is going to be a judgement call on your part. Its getting later in the season and if you do a water refill, will you have enough time for the water to heat back up before fall and you close the pool for the year or can you limp through untill closing with elevated chlorine levels.
    If you choose to do a water refill, yes you are on the right track.
    Randy H.

    Intex 18' X 48"
    G.A.M.E. Sandpro 75 Sand Filter (Single Speed 3/4 HP, 75 lbs sand, 2650 GPH, 7-way valve)

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    TFP Guide

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

    Re: Stubborn Algae

    Phosphate remover is not necessary. If you properly keep enough chlorine in your pool, it will kill the algae so it doesn't matter how much algae food (phosphates) are in the pool. Phosphate remover is an unnecessary expensive item.

    If you want to save more money:
    1. Don't purchase "PH+", you can buy borax (20 mule team) or washing soda to raise your PH.
    2. Algaecide will not kill algae once you have algae in the pool, generally this is only necessary when you close your pool to keep algae from occurring.

    Stop using the test strips, throw them out as their use is confusing and not reliable and trust the K-2006 results.

    You will probably run out of reagents quickly because you need to SLAM, so when you do, it is best to order the TF-100 from http://tftestkits.net/splash-page.html

    Comparison of test kits:
    http://www.troublefreepool.com/conte...its-comparison



    Read these articles in pool school:
    Defeating algae
    http://www.troublefreepool.com/conte...efeating-algae

    How to SLAM your pool:
    http://www.troublefreepool.com/conte...ntain-shocking

    Chlorine/CYA levels:
    http://www.troublefreepool.com/conte...art-slam-shock

    Use pool math to calculate how to adjust levels:
    http://www.troublefreepool.com/calc.html

    Since you have a DE filter, you are probably backwashing quickly, so best to get a handle on this so that you don't waste too much money on DE powder.
    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

  4. Back To Top    #4

    Join Date
    Aug 2014
    Location
    Florissant, MO
    Posts
    7

    Re: Stubborn Algae

    Thanks for your reply one_knight4u..... You make a good point, so I think I will super-chlorinate as is for now.
    1998 Doughboy 16x28x3.5 Oval AG pool (10,300 gallons)
    Hayward Power Flo Matrix pump w/single speed-1 hp motor & Hayward EC-50 DE Filter
    Use Aqua-Check Reg & Salt Test Strips / Taylor K-2006 & TF100 / Speedster Magnetic Stirrer
    Just added Intex SWG w/ECO 8110 (15000 gallon) Pool owner since 1978.

  5. Back To Top    #5

    Join Date
    Jul 2014
    Location
    Bastrop, Louisiana
    Posts
    199

    Re: Stubborn Algae

    I made the mistake last year of deciding to move my pool in mid Sept.
    Temps went from 80 F to low 70s F in that week.
    I never did get to swim after i moved it due to cold water. Just couldnt get the temps back up.
    If i would have left it, i would have gotten another couple of weeks of swim time i believe.
    Randy H.

    Intex 18' X 48"
    G.A.M.E. Sandpro 75 Sand Filter (Single Speed 3/4 HP, 75 lbs sand, 2650 GPH, 7-way valve)

  6. Back To Top    #6

    Join Date
    Aug 2014
    Location
    Florissant, MO
    Posts
    7

    Re: Stubborn Algae

    Thanks for all the good info kcindc..........I'll start reading......
    1998 Doughboy 16x28x3.5 Oval AG pool (10,300 gallons)
    Hayward Power Flo Matrix pump w/single speed-1 hp motor & Hayward EC-50 DE Filter
    Use Aqua-Check Reg & Salt Test Strips / Taylor K-2006 & TF100 / Speedster Magnetic Stirrer
    Just added Intex SWG w/ECO 8110 (15000 gallon) Pool owner since 1978.

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