Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: OCLT if heated to 85

  1. Back To Top    #1



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    OCLT if heated to 85

    pool is fine but will try OCLT for fun but...

    if pool is heated to 85 will OCLT still be accurate
    or
    does chlorine off gas at 85 degrees even if it is dark

    thanks
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: OCLT if heated to 85

    My pool is warmer than that. The temp should not affect the OCLT.
    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!

  3. Back To Top    #3



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    FC did not change overnight, was 1 at dark and 1 at daylight. So with vitamin C test (neg) and chlorine tab test (neg) would appear just have old old old plaster. Thank you.
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  4. Back To Top    #4
    GreatCanadian's Avatar
    Join Date
    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    844

    Re: OCLT if heated to 85

    FC is 1? Do you have CYA (stabilizer) in your pool?
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

  5. Back To Top    #5



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    Quote Originally Posted by GreatCanadian View Post
    FC is 1? Do you have CYA (stabilizer) in your pool?
    CY is 30
    but had not added bleach for couple of days so it had drifted down
    really sucks up a lot with sunny weather and pool temp 85

    added bleach today as per PoolMath

    thank you
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  6. Back To Top    #6
    GreatCanadian's Avatar
    Join Date
    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    844

    Re: OCLT if heated to 85

    Where/how are you getting your test results?
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

  7. Back To Top    #7



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    Quote Originally Posted by GreatCanadian View Post
    Where/how are you getting your test results?
    Have K2005 and the TFP chlorine kit (Chlorine FAS/DPD)
    latest are
    FC 1
    pH 7.6
    TA 80
    CH 250
    CY 30

    last 3 rarely change
    am always adding bleach and acid, would be nice if did not have to add so often, I guess they "off gas"

    bleach is cheap stuff 5.25% from the local hardware, am collecting too many empty bottles, recycle them all is painful
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  8. Back To Top    #8
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: OCLT if heated to 85

    Your FC is too low to prevent algae. See the FC/CYA chart in Pool School. That FC is really too low to do the OCLT in my opinion.
    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!

  9. Back To Top    #9



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    Quote Originally Posted by jblizzle View Post
    Your FC is too low to prevent algae. See the FC/CYA chart in Pool School. That FC is really too low to do the OCLT in my opinion.
    True, I shoot for FC5. But I was away for two sunny days and woompf, it dropped to 1.

    Not sure what to do when away as can't add jugs of bleach and the Rainbow is turned off. Maybe I need a liquid chlorine feeder.

    Perform the Overnight FC Loss Test (OCLT) directions do not mention a lower limit for FC. But I will try it again at higher levels. Water and the walls look Ok.
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  10. Back To Top    #10
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: OCLT if heated to 85

    The OCLT was written assuming you are trying to check if you are done with the SLAM process so your FC would be high. I would suggest raising your FC to around 10ppm and checking the OCLT. If yoy are going to be gone. You should raise the FC up to SLAM level and cover if possible.
    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!

  11. Back To Top    #11



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    Quote Originally Posted by jblizzle View Post
    The OCLT was written assuming you are trying to check if you are done with the SLAM process so your FC would be high. I would suggest raising your FC to around 10ppm and checking the OCLT. If yoy are going to be gone. You should raise the FC up to SLAM level and cover if possible.

    got it, will test when FC higher
    got it, will raise higher when I leave for a few days

    but
    last summer used chlorine tab feeder, now have moved to bleach
    buy 5.25% bleach at local hardware
    but would seem I will need 1.5 jugs / day; that is 45 / mo; at 6 per box that is 8 boxes / month transported and stored

    there must be a better way to add liquid chlorine, liquid chlorine feeder?
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

  12. Back To Top    #12
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: OCLT if heated to 85

    Have you shopped for stronger bleach, that does not sound like a very good deal. There are automatic bleach feeders, the Liquidator or the Stenner pumps.
    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!

  13. Back To Top    #13



    Join Date
    Jul 2012
    Location
    Whidbey Island, WA
    Posts
    392

    Re: OCLT if heated to 85

    good morning

    as per jblizzle

    I pumped FC up to do the OCLT

    was 11 at 7:45 pm, 10 at 8:50 pm and 11 at 5am
    pool is clear

    would seem I do not have organics eating chlorine, is good

    thank you
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

Posting Permissions

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