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Thread: Algae help

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    Algae help

    In my 3rd day of a first ever SLAM, my water has been clear the entire time, however I had green crud growing on the bottom and cove. Since the first brushing there has been no sign of green, CL level has been kept at 30+, I also have brushed at least twice a day. Today decided to shut down the filter for 1 hour to disassemble and clean, OMG split pea soup oozed out. Filter is now back running with new DE. Could the crud in the filter be causing my OCLT to fail, dropped 8 ppm last night
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

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    pwrstrk's Avatar
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    Re: Algae help

    Yep. It sure can.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Algae help

    I kinda thought so after I seen what spewed out of the filter housing, with some luck and new DE maybe tonight OCLT will pass, CC is < 0.5
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

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    BoDarville's Avatar
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    Re: Algae help

    Be sure to check around & behind any light fixtures as well as the ladder (if you have either of these). Those are also common places for algae to seek refuge. Here's an example...http://www.troublefreepool.com/think...ue-t65957.html
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Re: Algae help

    I do not have lights but do have steps mounted to the deck, we removed them and disassembled what we could and there was green inside the steps, removed all the sand that we could and rinsed and bleached the insides, and added new sand(weight). Failed another OCLT last night dropped 4.5ppm, brushed and recholrinatd this morning, trouble is pool water looks gorgeous.Will attach pic as soon as I figure out how to upload. Thx and any recommendations are very welcome at this point.
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

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    Re: Algae help

    Don't know if this will show
    Attached Images Attached Images
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

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    Re: Algae help

    You are very close...keep the faith. Do you still see any visible algae? If so, brush it up into the chlorinated water to get it killed quickly. It may cloud your water a bit but that'll clear up.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Algae help

    There is no sign of green anywhere that I can see. It just won,t pass a OCLT, all other results are good.
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

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    Mod Squad Bama Rambler's Avatar
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    Re: Algae help

    Could you get any bleach inside the handrails on the steps? If not you might need to figure out how to do that.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Charlie_R's Avatar
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    Re: Algae help

    Check the corners and under the basket of your skimmer. That is another place algae likes to hide.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Algae help

    As you know, the point of the OCLT is to see if there are remaining organics in your water. You have some but I do not think you have far to go at all.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Algae help

    Thx for the encouragement. Bama I did get bleach into the rails was also able to get a small brush inside. Charlie, I need to look at that again pretty sure we cleaned there, during this marathon I can't remember what or when, except for CL readings, I have been logging those.
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

  13. Back To Top    #13

    Join Date
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    Re: Algae help

    Clearly the filter was the primary source of the problem, but are you sure it's now clean? How about the pump basket and the skimmer basket? If you can't find anything, then a SLAM should eventually get rid of it IF circulation of chlorinated water is good, but I'm concerned with how the filter got so cruddy in the first place. It seems that the chlorinated water isn't getting circulated through the system properly.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  14. Back To Top    #14

    Re: Algae help

    Chem Geek,we disassembled the filter, hosed down the socks and then rinsed them in bleach water, also cleaned inside filter housing and pump basket with bleach water. We did reclean skimmer and basket as Charlie suggested. Recharged the filter with the proper amount of DE, circulation is good. Hopefully this will do it.
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

  15. Back To Top    #15

    Grand SLAM

    Mod Edit: Please keep all of you posts for the same issue in the same thread. Thanks, linen forum moderator

    I believe we won the battle. Question now is should I maintain 24/7 pump operation and maintain a higher than normal FC level for a few more days or can I resume normal pump time, I do 6 hrs a day, and let FC drop on its own, also should I disassemble and clean out the filter again, just did it on Sun., I am rather paranoid now. Had to reorder R-0871, don't know if I could get 1 more 25+ FC test. Thanks to all
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

  16. Back To Top    #16
    linen's Avatar
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    Re: Algae help

    Just to confirm...have you passed all three "end of shocking criteria" in the SLAM process (also in my sig)? If yes, then you can let your FC drop to normal levels and go back to your regular pump operation. If no, then keep at the SLAM process.

    You should clean your DE filter again when it goes up 25% from the "clean" pressure.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Algae help

    Yes, CC= 0, My wife had to due the OCLT last night for me due to my work schedule- FC drop < 1 I did FC test when I got home and appears right FC same as yesterday afternoon no chlorine was added, water is crystal clear
    AG 9000G vinyl-oval 15 x 24
    Hayward powerflo xl pump
    Hayward perflex DE filter
    TF100
    Wide mouth skimmer
    Direct sunlight all day
    W.PA/OH border

  18. Back To Top    #18
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Algae help

    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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