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Thread: Assistance please!!

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    pitguy3's Avatar
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    Assistance please!!

    My Dad is converting his pool and we have an issue that I can't comprehend... His pool is 18x33x48 and he has been using the ool calculator to determine his amout of bleach to add... He is using the TF100 test kit, and from what I gather, he is testing correctly for FC's... Here's the confusing part... When he tested tonight, he got 13 for his FC's... He put the amount that the calculator said and tested 1 hr later.. His FC level ROSE to 17... I had him retest with me on the phone and it had dropped to 16.5...Now... If he has all his levels right (Gallons and bottle size) WHY would the FC's RISE??? I am TOTALLY Blown away by this... Any ideas?? Today marks 1 week on the conversion and his water SPARKLES!!! He's using a Hayward Sand filter and as stated above 18x33x4ft... His actual water depth is 3'10.5"... He has been using OVAL on the calculator but I think it should be RECTANGLUAR, but when checking, it really doesn't change all THAT much... Again, Any ideas?????

    HELP!!!
    Intex 20x52 above ground pool-
    10600 gallons
    1 man 4 woman Bullfrog Hot Tub
    http://www.flickr.com/photos/pitguy3/se ... 763801706/
    ROLL TIDE!

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    Mod Squad JohnT's Avatar
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    Re: Assistance please!!

    Quote Originally Posted by pitguy3
    When he tested tonight, he got 13 for his FC's... He put the amount that the calculator said and tested 1 hr later.. His FC level ROSE to 17... I had him retest with me on the phone and it had dropped to 16.5...Now... If he has all his levels right (Gallons and bottle size) WHY would the FC's RISE???
    If he added bleach, you'd expect the FC to rise. It's the measure of unbound chlorine in the water, and bleach adds chlorine.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    pitguy3's Avatar
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    Re: Assistance please!!

    I agree... I WOULD expect it to rise... My point is, and I may not have said it right, but he put in the pool calculator, for the target to be 15... He added the recommended amount to raise it to 15... However, it went to 17... What gives??? This is not the first time he has tested HIGHER than what it was supposed to go to?? He has ALWAYS put 15 as the targeted amount...
    Intex 20x52 above ground pool-
    10600 gallons
    1 man 4 woman Bullfrog Hot Tub
    http://www.flickr.com/photos/pitguy3/se ... 763801706/
    ROLL TIDE!

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    Mod Squad JohnT's Avatar
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    Re: Assistance please!!

    I get 65oz to go from 13 to 15 ppm in his pool. Is that about what he added?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Assistance please!!

    Perhaps the pool is smaller than the gallonage he is calculating
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Butterfly's Avatar
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    Re: Assistance please!!

    Sounds like the pool water gallonage is lower than calculated???

    What is your dad using for "Size____gallons" in the Pool Calculator?

    What % bleach/LQ is he using?

    Edit: Okay, you type faster
    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. ~

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    pitguy3's Avatar
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    Re: Assistance please!!

    His pool is 18x33x4 and he is using 182 oz bottles of REAL clorox which is at 6%... I have verified all that... It has me utterly flustered at this point..... When he went from 13 to 15, he said it told him 2 quarts and change (74 ozs figured at 17800 gallons)... and thats what he told me he added...
    Intex 20x52 above ground pool-
    10600 gallons
    1 man 4 woman Bullfrog Hot Tub
    http://www.flickr.com/photos/pitguy3/se ... 763801706/
    ROLL TIDE!

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    pitguy3's Avatar
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    Re: Assistance please!!

    Quote Originally Posted by Butterfly
    Sounds like the pool water gallonage is lower than calculated???

    What is your dad using for "Size____gallons" in the Pool Calculator?

    What % bleach/LQ is he using?

    Edit: Okay, you type faster
    That's what I was thinking too... I had him pull a tape on it and it was 18x32 and his actual water depth was at 3'10" to 4'....

    It is acting like one of the following is happening:

    1. He is adding too much just because...

    2. the pool calc has a glitch (which I doubt because Mine works WONDERFUL!!)

    3. Something is askew in the gallons/bleach configuration...

    I am DUMBFOUNDED!!!
    Intex 20x52 above ground pool-
    10600 gallons
    1 man 4 woman Bullfrog Hot Tub
    http://www.flickr.com/photos/pitguy3/se ... 763801706/
    ROLL TIDE!

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    Butterfly's Avatar
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    Re: Assistance please!!

    Maybe a lot of variables going on:

    1. Pool volume inaccurate,

    2. Testing error, or

    3. Maybe Dad just added a little extra bleach.

    It may have you scratching your head, but it will all get worked out in the long run and his pool will succeed with the conversion.
    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!

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    Mod Squad Bama Rambler's Avatar
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    Re: Assistance please!!

    Quote Originally Posted by pitguy3
    His pool is 18x33x4 and he is using 182 oz bottles of REAL clorox which is at 6%... I have verified all that... It has me utterly flustered at this point..... When he went from 13 to 15, he said it told him 2 quarts and change (74 ozs figured at 17800 gallons)... and thats what he told me he added...
    When I do the calculation I get that he actually has 16,500 gallons. So there may be some of the difference. I also know that I tend to be a bit generous when adding LC so he may be doing the same.
    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

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    Re: Assistance please!!

    Mike,
    One of my readings during my conversion..I added to bump to 15 and when I read it an hour later it was 16. I just didn't add any bleach after that reading and went on with it.

    Deb
    27' 17,000 gal, AG,cartridge filter, 2.5 HP Waterway 2 speed

  12. Back To Top    #12

    Re: Assistance please!!

    you are talking about cl rising 3 ppm instead of 2ppm, which i find
    is insignifant.
    24,000 gallon ig fiberglass pool
    1 hp hayward pump
    hayward sand filter (250 lb)
    madisonville, ky

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    Re: Assistance please!!

    Adding one gallon (128 ounces) of 10% chlorinating liquid should add 4.3 ppm of FC to my 24,000 gallon pool. It is not unusual for my DPD-FAS test (done 1-2 hours after adding the chlorine) to read as a 5-6 ppm increase in FC. I've never tested the strength of my chlorinating liquid, but I'm guessing that some of the gallon jugs I'm buying sometimes has a concentration higher than 10%, sometimes by a significant amount.
    24,000 gallon inground freeform pool/spa circa 1983 (113 ft perimeter, 625 sq ft) with 350 gallon attached spill-over spa
    2007 2 HP, three-phase Hayward TriStar pump which is powered by an Ikeric VS-200 variable speed drive system
    1983 Laars XE Pool/Spa Heater Type ES 400,000 BTU, 1998 Hayward Super Star-Clear C-4000 cartridge filter (400 sq ft, 4 separate cartridges)
    1998 Polaris 380 pressure-side cleaner w/ 3/4 HP booster pump
    One skimmer :( and one PoolSkim :), One Supervision Galaxy LED pool lamp, Second story solar panels
    Hayward/GoldLine AquaLogic PS4 (replaced 1983 vintage dual circuit Intermatic timer)

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