Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 18 of 18

Thread: Algae not going away, I'm getting worried

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Algae not going away, I'm getting worried

    Okay I'm on my 3rd day now of the pool being at shock level and the color is still the same shade of green. I'm getting worried that I'm going to have to drain my pool. I have been brushing it often and constantly checking the FC level and keeping it above 15 but no results. Someone told me once that I need to kill the phosphates also. Do I need to do that and keep shocking it or do I just need to be more patient. I thought the color would have lightened by now. Please help.


    FC - 20
    pH - 7.8 (was 7.4 before I started shocking)
    TA - 120
    CH - 220
    CYA - 30-50
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  2. Back To Top    #2

    Join Date
    Jul 2009
    Location
    Shawnee, Kansas
    Posts
    92

    Re: Algae not going away, I'm getting worried

    I was in the same spot you are now a few weeks back. I ended up bumping my FC to closer to 30, but it was about the 3rd or 4th day I noticed a change in the color. You may be right on the verge, so be patient. Within a day or two after I was back to cloudy blue.
    Matt
    20,000 gallon, sand filter, IG vinyl

  3. Back To Top    #3
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Algae not going away, I'm getting worried

    How are you testing the water?

    There is a big difference in shock levels for a CYA of 30 and 50. If your CYA is 50 you should be shocking to 24, and that could explain why you aren't seeing progress..

    Phosphates are algae food, but they are irrelevant if you maintain proper FC levels.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  4. Back To Top    #4
    reebok's Avatar
    Join Date
    Apr 2009
    Location
    Lakeland, FL
    Posts
    1,268

    Re: Algae not going away, I'm getting worried

    you won't have to drain if you follow the methods outlined in pool-school/
    where is that cya reading coming from?
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Algae not going away, I'm getting worried

    Someone told me once that I need to kill the phosphates also. Do I need to do that
    No. But you do have to keep your FC levels up. That CYA test result is suspect. How are you testing?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Re: Algae not going away, I'm getting worried

    The CYA tested at about 40 before I started shocking the pool.
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  7. Back To Top    #7

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: Algae not going away, I'm getting worried

    How are you testing?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  8. Back To Top    #8

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Re: Algae not going away, I'm getting worried

    Ok I just tested the CYA and it showed 60 when the black dot dissapeared. But I was told that the algae in the water would cause the reading to be a little high. I have been running the FC at least over 20 anyway. It only dropped to about 15 once and I put it back up. I have a feeling my pump might have a lot to do with it. It's a 12400 gallon pool and it only has a 2500 gph pump filter.
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  9. Back To Top    #9

    Re: Algae not going away, I'm getting worried

    At CYA 60 on the CYA chart I see 24 for shock level and on the calculator I see 18.

    Are you getting good circulation?
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  10. Back To Top    #10

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Re: Algae not going away, I'm getting worried

    I've decided to keep my FC at around 30 for a while and see what happens. I cleaned the filter this morning and there was a lot of algae in it. Throughout today it looks like the dark green has changed to a lighter green. Hopefully it is starting to work. As far as the circulation its as good as it gets for the 2500 gph pump that I have. I can't afford to buy the 4000 gph one just yet. It is circulating though because I can see the water moving in a circular motion around the pool.
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  11. Back To Top    #11

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Re: Algae not going away, I'm getting worried

    I have another question on how I should be running my pump during all this. I have the skimmer that mounts on the top rail of the pool with a hose on the bottom of the skimmer that attaches to the port about 1/3 the way down the side of th pool wall. If I don't use the skimmer part I can just attach a plastic screen cap to that same port. Which way is best? Do i use the skimmer or will it filter the water better if I just put on the screen cap over the pump inlet port and bypass the skimmer?
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  12. Back To Top    #12
    Ohm_Boy's Avatar
    Join Date
    May 2007
    Location
    Orlando, FL
    Posts
    1,344

    Re: Algae not going away, I'm getting worried

    If the algae is becoming lighter, then what you are doing is working. When the algae is dead, it will be more of a gray and not green.

    And using the skimmer will be fine, as it also takes in water from the bottom of the skimmer can. You should brush the pool to stir up the dead algae periodically which will help get it to the filter. The Intex filters can clog quickly too, so you'll need to check it often.
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

  13. Back To Top    #13

    Re: Algae not going away, I'm getting worried

    And if you see algae gathered on the floor of the pool perhaps you can vac that away. But don't leave it there, as there could be living algae under the pile where while it is sheltered from chlorine it can start to grow again.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  14. Back To Top    #14
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Algae not going away, I'm getting worried

    Your CYA is 60. Shock to the appropriate FC level and run the pump 24/7 till it clears. Replace the disposable cartridges every 2-3 days until the water clears.

    Once this clears up, make sure you are running the pump at least 12 hours a day and change the filter every 1-2 weeks. Never let the FC drop below the min level for your CYA and you should avoid a repeat.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  15. Back To Top    #15

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Algae not going away, I'm getting worried

    Quote Originally Posted by csorton
    Ok I just tested the CYA and it showed 60 when the black dot dissapeared. But I was told that the algae in the water would cause the reading to be a little high.
    Try this--fill your CYA view tube with straight pool water (no R-0013). Look at the black dot. Does this look cloudy? If it does, the test could be affected. If it's basically clear then the test is unaffected.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  16. Back To Top    #16

    Join Date
    Jun 2009
    Location
    Keller, TX
    Posts
    19

    Re: Algae not going away, I'm getting worried

    So far so good. The water is pretty cloudy now but it's not green anymore? What does the cloudy water mean? Do I continue at shock level until the cloudiness goes away?
    Our pool is 12,481 gallons
    The pump has a cartrige type filter
    It's an AG pool
    Pump is an Intex 633 2500 gph

  17. Back To Top    #17
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Algae not going away, I'm getting worried

    Green to cloudy means some dead algae

    Unless you have the FAS/DPD test kit, shock 'til clear.

    See Pool School for How to Shock Your Pool.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  18. Back To Top    #18

    Re: Algae not going away, I'm getting worried

    Quote Originally Posted by csorton
    So far so good. The water is pretty cloudy now but it's not green anymore? What does the cloudy water mean? Do I continue at shock level until the cloudiness goes away?
    The algae is dead if it is not green, and it has been bleached white but is still floating around the pool. At this point your filter needs time to catch it all. You still need to brush just in case there is live algea hidden somewhere -- it can shelter underneath dead algae and grow safely there.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

Posting Permissions

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