Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: How much Clorine can burn off in a day?

  1. Back To Top    #1

    Join Date
    Aug 2013
    Location
    Hilton Head, SC
    Posts
    129

    How much Clorine can burn off in a day?

    OK, I've slowly been increasing the "guestimate" on the size of my pool (gallons). Yesterday my FC was 2. based on the pool math calculator, I used 6500g, FC 2, target 5, using 8.25 bleach. Calculator said to add 39oz.

    Now, I am in SC, temps in the upper 80's, very humid. How much FC should burn off in a give 24 hr period. CC is virtually 0.

    thx

    ed
    4k, IG, Gunnite, Jandy Valve, 1HP Haywood, 2" flow, single 2" line for skimming & vacuum, Pentair FNSP 36 DE w/125 GPM Multiport 50 PSI, TF-100 Test Kit, built 1991, Hilton Head, SC

  2. Back To Top    #2
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: How much Clorine can burn off in a day?

    Well, lots! What is the CYA level?
    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!

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: How much Clorine can burn off in a day?

    With a normal CYA and while maintaining normal FC levels. It is common to have to add 2-4ppm of FC every day.

    Lower CYA and higher FC levels will result in higher losses.
    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!

  4. Back To Top    #4

    Join Date
    Aug 2013
    Location
    Hilton Head, SC
    Posts
    129

    Re: How much Clorine can burn off in a day?

    CYA is around 40
    4k, IG, Gunnite, Jandy Valve, 1HP Haywood, 2" flow, single 2" line for skimming & vacuum, Pentair FNSP 36 DE w/125 GPM Multiport 50 PSI, TF-100 Test Kit, built 1991, Hilton Head, SC

  5. Back To Top    #5
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: How much Clorine can burn off in a day?

    Jason gave the best answer to your question.

    With 40 CYA, keep the FC between 3 and 7, and never below 7 3.

    When you dose the pool, aim for 7 FC. Wait 30 minutes and retest to make sure you hit target.

    24 hrs. later, retest and adjust back up to 7.

    Notice your FC is 2 in the first post. That is a no-no and an opportunity for things to start growing.
    Last edited by Butterfly; 07-01-2014 at 03:02 PM. Reason: correct minimun FC
    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!

  6. Back To Top    #6
    bobodaclown's Avatar
    Join Date
    Apr 2011
    Location
    Lakeland, FL
    Posts
    2,351

    Re: How much Clorine can burn off in a day?

    Hello, for the origional topic/question how much chlorine can burn off in a day, this discussion very indepth covers it:
    http://www.troublefreepool.com/threa...ater-Chemistry

    Roughly the half-life (depleted by 1/2) of unprotected chlorine in a pool is approx. 1 hour in full sun.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

  7. Back To Top    #7

    Join Date
    Aug 2013
    Location
    Hilton Head, SC
    Posts
    129

    Re: How much Clorine can burn off in a day?

    thanks! will target 7. And you meant never below 3, correct?
    4k, IG, Gunnite, Jandy Valve, 1HP Haywood, 2" flow, single 2" line for skimming & vacuum, Pentair FNSP 36 DE w/125 GPM Multiport 50 PSI, TF-100 Test Kit, built 1991, Hilton Head, SC

  8. Back To Top    #8
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: How much Clorine can burn off in a day?

    Quote Originally Posted by Emarshbuck View Post
    thanks! will target 7. And you meant never below 3, correct?
    Yep, you are correct. I corrected my post, thanks
    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!

Posting Permissions

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