Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 26

Thread: Pool test numbers - Need some advise

  1. Back To Top    #1

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Pool test numbers - Need some advise

    I have just started using the pool this month and the water seems to be extremely cloudy + I can see some algae (very minor) forming on a shallow part (6-8" deep). Every time I brush the algae, it reapears.

    Its also worth noting that we had a LOT of rain lately.

    Data:
    Pool 23000 gallons in ground
    200 sqft cartridge filter
    2hp pump
    jandy 1400 SWG

    Test results using Duraleighs TF-100 test kit (taken today at 8:30 pm 85 degree F)
    PH: 7.8 (this drives me crazy and I add 1/4 gallon of acid on a daily basis)
    FC: 3.5
    CC: 0.5
    TC: 4.0
    TA: 80
    CH: 340
    CYA: 20-25 (did this twice)

    Any advise on what should I tackle first? My plan was like this:

    1. Add stabilizer in order to bring CYA to about 40-50
    2. Shock the pool using Clorox.
    3. Pray

    Any advise/questions are welcome. Thanks,

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  2. Back To Top    #2

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Pool test numbers - Need some advise

    I think if you raise the CYA to 40-50 and shock the pool you will not need to pray......but prayer cannot hurt! Are your water returns agitating the water surface? This can cause PH to rise if I remember correctly.
    18x36 Vinyl In-ground w/roman ends 27,400G, Hayward 3/4hp with 300# sand filter. Hayward heat pump heater

    Pool School
    Pool Calculator
    Test Kits

  3. Back To Top    #3

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Yes, all three returns are pointed upwards and agitating the water. Thats how the pool builder set them up, I am going to turn them down.

    The pool just turned one year old this week, I thought maybe the PH was due to the plaster curing or something like that.

    Thanks for the reply, J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Pool test numbers - Need some advise

    I would shock with the CYA level you have now and then raise it up after you have a sparkling pool.

    The pH is probably due to the plaster AND the aeration. Changing the jets should hopefully help some.

    EDIT: Just realized you said the plaster was a year old and not a week old ... in that case the pH rise is not due to the plaster.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Pool test numbers - Need some advise

    Quote Originally Posted by jblizzle
    I would shock with the CYA level you have now and then raise it up after you have a sparkling pool.
    What he said.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  6. Back To Top    #6

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    OK, so I will shock first. Just so that I understand, will having a lower CYA mean that I will have to check the chlorine level much more often while shocking?

    Also does it make any difference if its raining while shocking the pool? It looks like I am going to have some rain unless I wait a couple of days.

    Thanks a lot for all the help! J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  7. Back To Top    #7
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,331

    Re: Pool test numbers - Need some advise

    When shocking you need to check the FC as often as you can and once an hour is preferred, no matter what your CYA level is. Hit it often and hard!

    It doesn't make much difference if it's raining.

    I agree with shocking with the CYA where it is now and raising it later.

    One problem with your rising pH is the fact that you have such a low level of CYA. If you raise it you can turn your swcg down and thereby your rate of rising pH will slow down also. The eyeballs turned up doesn't help either. You can also let the TA come down to about 60 or 70 and that should help also. BUT, don't worry about any of that until you complete the shocking process.
    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

  8. Back To Top    #8

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Pool test numbers - Need some advise

    Great!

    Have a bunch of 10% and 6% bleach. Will start shocking in an hour after cleaning the filter and brushing the pool.

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  9. Back To Top    #9

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    OK, this is how the day went. I started this at 3pm, brushed the whole pool and cleaned the filter. Turned off the SWG.

    Tested the pool and got these numbers:

    PH: 7.8
    FC: 4.5
    CC: 00
    TC: 4.5
    CYA: ~20

    I aimed to shock based on CYA of 15 since it was so low, but somehow screwed up by using 10% chlorine and ended up with these numbers

    Time: 4:15 pm
    PH: 7.3 (I added muriatic acid)
    FC: 22
    CC: 0
    TC: 22

    Then retested as follows:

    Time: 5:05/6:05/7:30/8:40/10:05
    FC: 20/18.5/18/19.5/19.5
    CC: always 0

    Not sure why after cleaning the filter (at 8pm) my FC went up, I tested it at different spots in the pool and it was consistent. I am going to let it be for today and retest early in the morning.

    I also brushed the whole pool at 8 pm and cleaned all filters.

    I have to say that the pool looks better, but at night its somewhat cloudy with the light on.

    Thanks for all the help guys, will keep this updated.

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  10. Back To Top    #10

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Its worth noting that I started late because it was raining real bad throughtout the day. The day being overcast probably helped mitigate the loss of FC.

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  11. Back To Top    #11
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pool test numbers - Need some advise

    The PH test is often off, or even totally wrong, when FC is that high. As a general rule it is best to not try to adjust PH when shocking. Given that you may have just lowered PH too much, the next time as your FC level drops below 15 you should check the PH again and adjust it up if it is too low and do that again when FC comes down to normal levels.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  12. Back To Top    #12
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,331

    Re: Pool test numbers - Need some advise

    I'd run the OCLT tonight and see what it shows.
    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

  13. Back To Top    #13

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Last night I FC went down 1.5 points. I have been keeping up with the pool all day and kept the chlorine in check throughout the day ... I am sure tonight it will be fine.

    The water looks clear and blue, much better than two days ago.

    One thing I am not sure of why is that before my CC was 0 and now it is showing CC of .5. I wonder what could have caused this and whether its bad or not.

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  14. Back To Top    #14
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,331

    Re: Pool test numbers - Need some advise

    It just goes that way sometimes.
    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

  15. Back To Top    #15

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Today's recap:

    Time: 8 am / 1:30pm / 3:30pm / 4pm / 5:30pm / 7pm / 8pm / 10pm
    FC : 17.5 / 14 / 11 / 18.5 / 15.5 / 16 / 16 / 16
    CC : 0 / .5 / .5 / .5 / .5 / .5 / .5 / 1

    I added 1 gallon of 10% bleach @ 4pm, cleaned the filter once ... thats it. I am positive it will pass the overnight test, my only worry is the CC creeping up on me.

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  16. Back To Top    #16

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Overnight results:

    10pm
    FC: 16
    CC: 1

    7am next day
    FC: 16
    CC: .5

    Should I start adding CYA now, or wait until the chlorine level drops off a little bit? I am going to try and aim for a CYA of 50 and then next week retest and up it to about 70.

    Thanks for all the help guys!

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  17. Back To Top    #17
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,331

    Re: Pool test numbers - Need some advise

    Since you're so close to not passing the OCLT, If I were doing it, I'd do it one more night just to be absolutely sure I passed. I'm just like that though. Technically you passed it.

    You could go ahead and start bringing your CYA up to the final level since you've passed the OCLT.
    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

  18. Back To Top    #18

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    Dave,

    Thanks for the advise. I rather follow your advise and keep it going one more day just to make sure. I will add CYA tomorrow morning.

    I have the week off from work, if I was working I am not sure I would have been able to do this ... J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  19. Back To Top    #19

    Join Date
    Apr 2011
    Location
    WPB, Florida
    Posts
    51

    Re: Pool test numbers - Need some advise

    I did not loose any FC, but my CCs are at 1 ???? Why would that be? do I need to keep shocking?

    J
    23K gal, in ground gunite, 2 HP Jandy pump, 200 sqft Jandy cartridge filter, Jandy SWG, Gulf Stream heat pump, Jandy Aqualink RS, 1HP air blower

  20. Back To Top    #20
    Administrator Leebo's Avatar
    Join Date
    Jul 2011
    Location
    Eastern Ohio
    Posts
    6,599

    Re: Pool test numbers - Need some advise

    What's the water look like? Pics will help. The 1CC shows that something is hiding somewhere. Make sure you're brushing the heck out of the pool. When was the last time you cleaned the filter??

    I myself would keep shocking.

Page 1 of 2 12 LastLast

Posting Permissions

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