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Thread: Is this algae?

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    Is this algae?

    Hi, noticed some green in the pool. It's dusty green. I've had my solar cover on most of the summer. I've been in the pool religiously at least 4 times per week. See pic for green on ladder.

    Advice?
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  2. Back To Top    #2

    Re: Is this algae?

    Forgot to mention I'm in North Jersey.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  3. Back To Top    #3

    Re: Is this algae?

    I just used a hose on the ladder and all the green just washed right off.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

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    Catanzaro's Avatar
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    Re: Is this algae?

    Can the ladder be removed? If so, I would recommend cleaning in your driveway with some bleach, a small soft brush or sponge, household bleach and water. Allow the bleach to sit and rinse off. This should do it.

    If not, then clean manually with a little bleach and wipe off with old rags or towels, etc. This also could be moss if shaded a lot and maybe a small pressure washer with a 60 degree tip may work.

    I am a newbie so hard to tell.
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  5. Back To Top    #5

    Re: Is this algae?

    Fc=7.5
    Cc=0.5
    Tc=8.0
    Cya=100

    Guess that cya is too high.. I'm really want to hold off with until the spring to get cya down. Only a few more weeks of the season here.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  6. Back To Top    #6

    Re: Is this algae?

    No trees around pool.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  7. Back To Top    #7

    Re: Is this algae?

    Sorry for so many posts.. PH is 7.8
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

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    Re: Is this algae?

    Have you done the dilution CYA test?

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    Wildcat's Avatar
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    Re: Is this algae?

    Quote Originally Posted by TechJPC View Post
    Fc=7.5
    Cc=0.5
    Tc=8.0
    Cya=100

    Guess that cya is too high.. I'm really want to hold off with until the spring to get cya down. Only a few more weeks of the season here.
    sure looks like algae to me. Was it in the portion of the ladder above or below the water line? If only above it may be due to the dampness caused by the cover being on. If below you could have algae in the pool water itself.

    First,I would up your FC. 7.5 is at low end if your CYA is truly 100, it could be higher. Do the dilution test, see the extended directions for how to do it.

    http://www.troublefreepool.com/threa...Kit-Directions



    In the meantime I would raise your FC to the target CYA of 12, then correct once you have confirmed your CYA level.
    http://www.troublefreepool.com/conte...art-slam-shock

    You should probably do an OCLT just to be safe

    http://www.troublefreepool.com/conte...loss-test-oclt
    10000 Gal, IG Pebbletec, pop up cleaners,Hayward EcoStar VS, 425 sq ft Hayward Cartridge, waterfall feature

  10. Back To Top    #10

    Re: Is this algae?

    OK... I put 7 gallons of bleach in yesterday. Right now I'm brushing then vacuuming the pool. There was really only a few small green spots that didn't get cleaned yesterday, so nothing new is in the pool. The water is somewhat cloudy. I think I may have read my cya a little higher yesterday. Today I read it with the sun shining on me whereas yesterday it was somewhat cloudy.

    This mornings numbers:
    Fc=32.5 yikes
    Cc=0
    Tc=32.5
    Ch=150
    Cya=85ish

    I ran out of the cya reagent after this reading so I have to order more.

    I've decided to retire the solar cover for the remaining weeks. Looks like the warmest weather of the summer this week in NJ. I am hoping to get in the water maybe tomorrow. What do you think?
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  11. Back To Top    #11

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    Catanzaro's Avatar
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    Re: Is this algae?

    This happened to me after treating the pool. I did not have algae, but probably about a day away from an outbreak. My FC level was near "zero". The Pool Store kept recommending that my levels should be around 1 ppm with the mineralizer.

    After I poured in bleach the water became cloudy. Vacuumed the pool floors and walls and ran the filter for a day or so. The water cleared up. Since then the frog is on empty and I am using 12.5% bleach (adding 16 ounces daily) and testing in a few days. The water has never looked so crystal clear. I thought the water was clear before, but not like this. I am keeping my levels based on CYA around 4-5 ppm. It is important to figure out how much FC you are loosing daily and then every day or every other day treat the pool. I personally am enjoying this and just figured out that I can probably save close to $500 per season here in NJ (short period) on chemicals that the pool store recommends. Good Luck.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

  12. Back To Top    #12

    Re: Is this algae?

    Check reading this morning before going to work.

    FC=17.5
    cc=0.5
    TC=18.0
    PH = 7.8+

    Should I hit it again tonight after work with bleach ? I haven't had a chance to do any other tests. I was in the pool yesterday and brushed it all over 2 times. The liner felt clean, no slime. Ladder is clean also. As of this afternoon, the filter will have been on for 48hrs straight. I really don't want to have to keep it running 24/7.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  13. Back To Top    #13
    Smykowski's Avatar
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    Re: Is this algae?

    If the water is cloudy and you're seeing green, you need to do a complete SLAM. If you caught it early, it shouldn't take long.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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  14. Back To Top    #14

    Re: Is this algae?

    Quote Originally Posted by Smykowski View Post
    If the water is cloudy and you're seeing green, you need to do a complete SLAM. If you caught it early, it shouldn't take long.
    It was still a little cloudy this morning, no green though.
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  15. Back To Top    #15

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    Re: Is this algae?

    You need to get that CYA down. I would have suggested you start it before adding all the bleach. Replacing half your water in a 5700 gallon pool isn't a big deal to me.
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    Re: Is this algae?

    +1 on the CYA cure now as it would allow you to use less bleach for a proper SLAM to rid your pool of algae. IMHO it's better to put your pool to bed for the winter in the best shape you can rather than with it needing work first thing in spring when you open.
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  17. Back To Top    #17

    Re: Is this algae?

    Yeah, I hear you on the CYA and draining 1/2 the pool. I would absolutely love to replace the water and I know it's the right thing to do , but, I have about 2 weeks of the season left and I just want to get through it w/o draining the pool (Honestly I do not have the time). Also, on that point ... will my liner wrinkle when I drain and refill ?

    Could the high CYA level be making me lose about 15ppm each night over the past 2 nights? I was in the pool last night, no slime, no green and the water seems a little bit clearer.

    Would backwashing my filter help ?

    How do I manage to get through these next 2 weeks ?
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

  18. Back To Top    #18

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    Kiss4aFrog's Avatar
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    Re: Is this algae?

    If you are not seeing green then you need to keep a chlorine level of 10ppm for the next two weeks. If you see green you'll need to SLAM at a level of 35ppm to get rid of the "green" if you have a CYA level of 85.

    CYA will not cause a loss of chlorine.

    Backwashing should only be done when you are 20-25% over your clean pressure. If you backwash too often it's actually doing a poorer job of filtering. As the filter fills up and plugs up with stuff it will filter smaller and smaller particles so it's actually more efficient slightly dirty. See Pool School: http://www.troublefreepool.com/conte...f-pool-filters
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
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  19. Back To Top    #19

    Re: Is this algae?

    So.. Passed my OCLT 2 days ago. Re-tested my CYA 2 days in a row with my new reagent ( I ran out).
    CYA showed about 60 both days. Is it possibly my old re-agent was "bad" ? I tested it 2 times initially and and was at about 90-100.

    Water is beautiful

    https://www.dropbox.com/s/5xbykgff62...pg?dl=0http://

    https://www.dropbox.com/s/vdx5xopfae...pg?dl=0http://
    Thanks, Joe

    New Jersey
    - 15ft round Above Ground pool with vinyl liner (10 yrs old)
    - 5700 gallons, Sand Filter, 1.5hp pump

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    Re: Is this algae?

    Glad to hear that you passed the OCLT.

    Your CYA drop could have happened when you replaced water during the backwashing process.
    Karen
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