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

Thread: Am I fighting algae?

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Am I fighting algae?

    I have been testing my pool for a few weeks and I think I am fighting algae at the moment. It looks green/yellowish and when I vaccumed it, it seems move around like dirt. I noticed it a bit this week, but thought it was just pollen.

    I haven't cleaned my filter in a few weeks, and I think this is part of the problem. It's a cartridge filter. When I cleaned it on Sunday it was spewing out green liquid.

    CC was never higher than 0 throughout the week. FC was 7 at the lowest.

    Test Results - 8/24
    FC - 7
    CC - 0
    CYA - 38 ish
    pH- 8.2
    CH - 400
    TA - 160

    8/24 started SLAM, vaccumed pool and cleaned filter. Water looked cloudy after vaccuming and changed from greenish/yellowish to grayish cloudy.

    8/25
    FC - 17
    CC - 0
    pH - 7.8
    Cleaned filter again.

    Will continue SLAM until I pass the three tests
    1. Clear water
    2. overnight FC is under 1
    3. CC is 0

    Is it possible my filter is not working correctly as well? Am I fighting algae even though my CC was never over 0?
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Am I fighting algae?

    The best way to tell is to perform the OCLT.
    http://www.troublefreepool.com/conte...loss-test-oclt

    Get that pH under control too. Lower to 7.2 and try to get your TA down in the process.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  3. Back To Top    #3

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    I did add some more acid in the morning before going to work. I did shoot for 7.2 with what I added and I will see what it is tonight and add more acid and chlorine if need be.

    I will do OCLT tonight as well. Thanks.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  4. Back To Top    #4

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Am I fighting algae?

    With your FC at 17 the pH test might not be accurate. If it gets down to 10 I'd retest the pH and adjust to 7.2 like RobbieH advised. The chlorine will work better (less expensive $$$) at the proper pH level. It's not a big deal but it's something that's easy to correct and then SLAM and MAINTAIN that SLAM FC level as best you can.

    At FC above 10 the pH test isn't accurate which is why it's recommended to correct it before you start your SLAM and then not to bother testing again until after the SLAM is done.
    '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
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  5. Back To Top    #5

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    So I got home and tested my numbers, and rinsed off the filter.

    FC - 13.5
    CC - between 0 and 0.5
    Water cloudy can somewhat see the drain 7 feet down.

    I then added some chlorine, 0.5 gallons to get to about 16 to 17 FC. I went ahead and did some stuff in the house for a bit. Then, I brushed the pool and my water definitely got cloudier, a grayish greenish color. I did the test for the overnight chlorine test.

    FC - 18.5 (37 drops)
    CC - 0

    I will test my FC in the morning to see if I using more than 1 ppm overnight.

    Should I brush the pool everyday during SLAM?
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  6. Back To Top    #6

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Am I fighting algae?

    Please brush at least once a day and run the pump 24/7 until the end of your SLAM.

    SLAM:

    Test the FC level and add enough chlorine to bring FC up to shock level (see here for correct shock level)
    Test and adjust chlorine levels as frequently as practical, but not more than once per hour, and not less than twice a day. Chlorine additions should be frequent, especially at the beginning. Algae and other organic debris will consume chlorine very rapidly at first. As things progress, you will lose less chlorine each cycle and can add chlorine less frequently.
    Brush and/or vacuum the entire pool once a day
    Backwash or clean the filter as needed
    Vacuum up debris as needed
    '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
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  7. Back To Top    #7

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    My water is still very murky but my OCTL was 1 ppm (35 drops) this morning. I cleaned the filter some and did a light brushing. I added a bit of chlorine to keep it above 16 FC for the whole day, 1/2 gallon.

    How do I check if my filter is doing it's job? It is a cartridge filter.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  8. Back To Top    #8

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Am I fighting algae?

    It can take some time to filter out all the dead stuff. You just need to be patient. Give it a day and see if the water looks clearer. Is the pressure rising slowly day to day ??
    '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
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  9. Back To Top    #9

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    I tested last night and this morning. I pass the OCTL test, and the pressure on my filter has gone up very little, under 1 psi difference from yesterday. I am using about 1 gallon of chlorine if that a day so far. The water hasn't really cleared up from yesterday.

    I brushed and vacuumed yesterday and brushed some this morning. I did learn I did some things wrong with the vacuuming and found this video that is helpful.

    https://www.youtube.com/watch?v=09sVvEKKHvY
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  10. Back To Top    #10

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    I think my pool is starting to clear up a bit finally I can the main drain a bit better. I'm hoping this will be ready by the weekend.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  11. Back To Top    #11

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    Pool has really cleared up a lot in the past day. I can see the drain from anywhere around the pool now. I have vacuumed and brushed at night and in the morning. I cleaned the filter after the psi went up by 2 and man the filter had a lot of green algae in it.

    I'm hoping to be done with the SLAM by Sat or Sun, but the pool can be enjoyed now for the holiday weekend.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  12. Back To Top    #12

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    The last little bit of stuff floating around in the pool is proving to be a challenge to get rid of it. I am vacuuming the bottom twice a day and brushing the pool twice a day as well. Sometimes when I vacuum I open the pump output which is a hose connected at the top.

    The pump is running 24/7 and for the most part is runs at low speed with a few hours at speed 2 of 4. When I vacuum I run the pump at speed 4.

    I'm also cleaning the filter every couple of days.

    Is there a better way to waste water from the pump during the vacuum? Any tips on getting the floating algae out of the pool?
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  13. Back To Top    #13

    Join Date
    May 2014
    Location
    Current: Singapore Previous: Clayton, Victoria, Australia
    Posts
    584

    Re: Am I fighting algae?

    Quote Originally Posted by PoolStudent View Post
    Pool has really cleared up a lot in the past day. I can see the drain from anywhere around the pool now. I have vacuumed and brushed at night and in the morning. I cleaned the filter after the psi went up by 2 and man the filter had a lot of green algae in it.

    I'm hoping to be done with the SLAM by Sat or Sun, but the pool can be enjoyed now for the holiday weekend.
    I hate to break this to you, but it is unlikely that SLAM would be completed by Sat or Sun. That being said, it is safe to swim up to SLAM levels, provided you can see the bottom of the pool (for safety reasons).

    Quote Originally Posted by PoolStudent View Post
    The last little bit of stuff floating around in the pool is proving to be a challenge to get rid of it. I am vacuuming the bottom twice a day and brushing the pool twice a day as well. Sometimes when I vacuum I open the pump output which is a hose connected at the top.

    The pump is running 24/7 and for the most part is runs at low speed with a few hours at speed 2 of 4. When I vacuum I run the pump at speed 4.

    I'm also cleaning the filter every couple of days.

    Is there a better way to waste water from the pump during the vacuum? Any tips on getting the floating algae out of the pool?
    With a cartridge filter (could you add that detail to your signature please?) there isn't really any other way.

  14. Back To Top    #14

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    The water has quite of sparkle to it again! There is just a little bit of cloudiness and I didn't see anything really on the pool floor this morning.

    I'm passing everything except having very clear water. Once I pass this, I will probably go one more day of SLAMing just to be safe.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  15. Back To Top    #15

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    I'm calling my SLAM complete as I have never seen the water this clean before. Thanks for the help everyone. I will keep an eye out for any signs of algae of the next few days.
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  16. Back To Top    #16

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Am I fighting algae?

    Life is good. Time to kick back and enjoy that water now
    '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
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  17. Back To Top    #17

    Join Date
    May 2014
    Location
    Central Florida
    Posts
    66

    Re: Am I fighting algae?

    I am getting small amounts of visible algae. My pool doesn't get too much sunlight and my FC is still at an 8 from last weekend. The algae seems to grow in a couple of spots which is what happened during my last SLAM.

    Is this a case where adjusting my returns could solve my problems? Also, would getting a pool cleaner running help prevent my problems as well?
    16K gallon in ground plaster pool
    Hayward star clear plus c1202 Cartridge filter
    4 speed Pentair Intelliflo Pump
    TF-100 w/Speed Stir
    Manual Brush and Vacuum

  18. Back To Top    #18

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: Am I fighting algae?

    Yes and yes. Isolated algae in poor areas of circulation is best handled by changing the circulation pattern or otherwise getting water mixed in the region. If it's only in shady areas, yellow/mustard in color, and dust-like going into a cloud in the water if you try and move it, then that is yellow/mustard algae. Otherwise, it's probably regular green algae.
    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"

Posting Permissions

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