Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 19 of 19

Thread: Eatin' up the chlorine!

  1. Back To Top    #1

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Eatin' up the chlorine!

    OK, I just went through getting my CYA from 200 down to 50 with 2 large water changes. Now the pool is crystal clear but is eating up chlorine. I am having to add a 1.42G container of bleach every day just to keep my chlorine above 2 or 3 ppm which is still low. Last night I checked my FC after sunset and it was at 4.0, this moring ir was at 2.8 so I am losing FC at night. I am going to bring my FC up to 20 and hold it there until I no longer see the large drop at night....is this correct? Everything else (PH, Alk, etc) is in line.
    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

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Eatin' up the chlorine!

    Correct - until the FC holds overnight (1ppm or less loss) the cc is .5 or less and the water is clear.
    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

  3. Back To Top    #3

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    Is there an estimate as to hold long this process takes or does it all depend on what the chlorine is dealing with? Are we taking a day or 2 or a week?
    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

  4. Back To Top    #4
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Eatin' up the chlorine!

    Depends, every situation is unique. I cleared a green pool in 2 days with 4 bottles of chlorine and another similar size pool with basically blue cloudy water took over a week and 60 bottles of 12.5% chlorine because the pool was full of ammonia. You just can't predict how long.

    The harder you hit it the faster it will go. Meaning, test as often as every 1-2-3 hours and keep it at 20 - don't let it drop down at all if you can, and that will speed up the process.
    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

  5. Back To Top    #5
    dmanb2b's Avatar
    Join Date
    Apr 2009
    Location
    NY
    Posts
    3,728

    Re: Eatin' up the chlorine!

    It's hard to tell, in some cases 2 days, in some cases it can take a 5-7 days. The key is to shock hard and fast, and keep FC above shock level as long and consistently as possible, until FC holds overnight, the water is clear and CC is 0.5 or below

    edit...FPM beat me to it...but we are saying the same
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  6. Back To Top    #6

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    Thank you! On a side not just wanted to thank TFP, I never thought taking care of a pool would be this interesting. Cant say enough about the pool calculator...what an amazing tool!
    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

  7. Back To Top    #7

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    Okay, this shock thing is going to end at some point right? My water is crystal clear but every day it's a battle to keep my FC at shock level. Due to work and life in general I do manage to keep it in the 15-21 range but I am really getting tired of adding over 300oz of bleach every time I check the water. My current numbers CYA 50, FC 21, CC 0, PH 7.6, TA 70......... I am still losing 3-4 ppm overnight. I vented, I feel better!
    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

  8. Back To Top    #8
    dmanb2b's Avatar
    Join Date
    Apr 2009
    Location
    NY
    Posts
    3,728

    Re: Eatin' up the chlorine!

    Are you using the Fas-dpd to test FC? Also on the OFCLT, are you taking the FC measurement in the evening when it get's dark and before the sun comes up?

    Just double checking the obvious
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  9. Back To Top    #9

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    Yes and Yes, last night the FC dropped 3.5 overnight.....granted, I was a little late checking my FC this morning but it's still clear there was a pretty good drop.
    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

  10. Back To Top    #10

    In the Industry

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

    Re: Eatin' up the chlorine!

    BOR,

    Keep the faith, my friend. You have an excellent grasp of the concept so now you just have to keep executing the plan.....it WILL work....it ALWAYS does.

    Yours seems excessively troublesome and I can't answer why but remember that two things (and only two things) consume chlorine.....sunlight and organics in your pool. The OFCLT eliminates sunlight so you are left with only one possibility.

    Hold that shock level up there as best you can and we'll keep cheerin' for ya'.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  11. Back To Top    #11
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Eatin' up the chlorine!

    ...............and brush every little nook and cranny good! :P
    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!

  12. Back To Top    #12

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    I think tomorrow I am going to be pulling apart my sand filter to see if there is a dead cat inside it. I have been shocking for over a week and my pool isn't smart enough to pass the overnight test. What I have decided to do is raise the FC up to 23 and see if we can move this thing along. Right now it should be sitting around 26 to give me a little wiggle room when it drops like a stone tonight. In the morning, it's getting 2 more 182oz bottles of bleach! On the brighter side, the pool is crystal clear!
    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

  13. Back To Top    #13

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Eatin' up the chlorine!

    Went to bed last night with the fc at about 26, got up this morning and added 2 more 182oz bottles of bleach. Could not test the water, ran out of regent. Anyway got home, found more regent in the mailbox, tested pool and fc was down to 13. Added 3 more bottles of bleach. Cya 50, ph 7.4. I will do a fc/cc test tonight to see what happens. I just don't understand what could be in the water that is eating up this much chlorine. The temps here today were 95+ and my pool sits in full sun all day.
    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

  14. Back To Top    #14

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Eatin' up the chlorine!

    Okay, added the 3 jugs around 530 this evening which, according to the pool calculator should have brought my fc up to 23. Its almost 9pm and my fc has already dropped to 19 cc is 0.5. I'm open for suggestions! BBB for this pool is Buy Bottles in Bulk!
    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

  15. Back To Top    #15
    dmanb2b's Avatar
    Join Date
    Apr 2009
    Location
    NY
    Posts
    3,728

    Re: Eatin' up the chlorine!

    When you raised FC to 23 per the pool calculator, did you confirm you in fact acheived 23ppm. It almost seems as if your gallonage may be off.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  16. Back To Top    #16

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    No, I did not confirm that with a test but I will follow up on that tomorrow. In the early morning I will check the FC and then add a bottle of bleach and measure again in an hour or so. When I see what the increase is I will play with the pool calculator and my gallons.
    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

  17. Back To Top    #17

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    Well, my FC held at 19 overnight. I didn't add any more chlorine to test the volume, I look at that tonight. I was just pleased that it didnt drop!
    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

  18. Back To Top    #18
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Eatin' up the chlorine!

    Quote Originally Posted by BadOleRoss
    Well, my FC held at 19 overnight. I didn't add any more chlorine to test the volume, I look at that tonight. I was just pleased that it didnt drop!
    About time! Guess your pool is smart enough to pass the OFCLT

    Just wondering, did you ever check your filter?
    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!

  19. Back To Top    #19

    Join Date
    Apr 2011
    Location
    Lynchburg VA
    Posts
    393

    Re: Eatin' up the chlorine!

    If you are talking about checking the filter for a dead cat....no! I have no idea why it took so long to get whatever it was out of the water, I am just glad that part is over!
    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

Posting Permissions

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