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Thread: how slow can slow be

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    how slow can slow be

    Hi again
    is cool here in W Washington, a little sun now and then, pool is covered, water is clear
    on 10/2 was using K-2005, diluted pool water 1:4, and found FC 2-3, so then 8-12ppm
    have added no bleach and Rainbow is set to zero, ie closed
    today 10/15 the chlorine test kit arrived from http://tftestkits.net/Single-Item-Tests-c6/
    and returned FC 12 and CC 0

    is it possible that FC has not declined for 13 days?
    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.

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    Re: how slow can slow be

    is it possible that FC has not declined for 13 days?
    No, that's not really possible.

    The problem is likely in your dilution. Each time you dilute the accuracy gets thrown way off so a 4:1 dilution is pretty meaningless.

    Go forward with your new FAS/DPD test and you'll be fine
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: how slow can slow be

    Quote Originally Posted by duraleigh
    is it possible that FC has not declined for 13 days?
    No, that's not really possible.

    The problem is likely in your dilution. Each time you dilute the accuracy gets thrown way off so a 4:1 dilution is pretty meaningless.

    Go forward with your new FAS/DPD test and you'll be fine
    thank you

    will follow with the new test kit and see what happens over the next days weeks and report

    is kinda fun not having to add bleach / tabs

    maybe I have a spontaneous source of Cl (dead worms, Puget Sound rain, old plaster, deer pee)
    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.

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    y_not's Avatar
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    Re: how slow can slow be

    It's that deer pee that'll do it!
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

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    Re: how slow can slow be

    so have new test kit
    10/16 FC 12.5 (10cc, 25drops)
    10/25 FC 12, CC 0, pH 7.6, TA 60, CH 240, CYA 50 (10cc, 24 drops)
    still cool, cloudy, covered
    so in 9 days drop of FC essentially zero
    so am nervous
    is this Ok or
    am I about to see yellow water
    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.

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    Re: how slow can slow be

    If there are tabs in the feeder, you might get some chlorine from the feeder even with it set to zero.

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    Re: how slow can slow be

    Pool is covered and there is no swimming? Combine that with cold water temps and your FC can last a long time since the chlorine is not being used by the sun or organics. It won't last forever, but could last for awhile.

    Also, when you did your previous dilution of 1:4 (1 part pool water combined with 3 parts non-chlorinated water?) your uncertainty could easily have been higher than +/-4 ppm due to the precision of that test.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: how slow can slow be

    so the test continues

    pool clear, covered
    weather cloudy cool
    10/16 FC 24 drops 10 cc; CC none
    11/5 FC 24 drops 10 cc, CC none

    will continue to follow
    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.

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    Re: how slow can slow be

    So does that mean 24 drops into 10ml sample so your FC is 12ppm?
    If so, just report the ppm
    Jason, TFP Moderator
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    Re: how slow can slow be

    so the tracking of FC decline continues
    FC was 12 on 10/2 and 9 today 12/4
    so declined 3 in two months

    also
    troublefreepool chlorine tester is cool
    what do I vac up in the winter? leaves worms and one rat, but very little stuff as back wash is very clean
    pH continues to creep up and I bump down with acid every so often (TA 60); why does pH creep up?
    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.

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    Re: how slow can slow be

    What's the water temp? As temp falls, the pH will go up.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: how slow can slow be

    41 but
    it creeps in the summer as well
    seem to always be adding chlorine and acid (tho not chlorine now)
    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.

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    Re: how slow can slow be

    The pH tends to rise in most every pool. More so in an SWG pool. It's the nature of the beast as the TA slowly outgasses.

    Chlorine, of course, is a consumable item and you will be adding it for the rest of your pool's life.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: how slow can slow be

    Quote Originally Posted by engrav
    41 but
    it creeps in the summer as well
    seem to always be adding chlorine and acid (tho not chlorine now)
    What is your TA? Higher TA will cause quicker ph drift up.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Smykowski's Avatar
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    Re: how slow can slow be

    Quote Originally Posted by engrav
    41 but
    it creeps in the summer as well
    seem to always be adding chlorine and acid (tho not chlorine now)
    I'll let ChemGeek correct me if I'm wrong, but the pH changes are for two different reasons. In the summer, temp is relatively constant but pH changes anyways - high TA, outgassing/aeration, the effect of the SWG, etc. In the wintertime, there are no appreciable changes to your pool water except for temp, and the pH is changing because the temp is changing.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: how slow can slow be

    end of experiment, how slow can slow be
    FC is now 7, took 3 months to drop from 12
    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.

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    pwrstrk's Avatar
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    Re: how slow can slow be

    With pool covered and cold water temps I think that is good. What is your water temp ?
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: how slow can slow be

    Quote Originally Posted by pwrstrk
    With pool covered and cold water temps I think that is good. What is your water temp ?

    Hi

    39
    too cold to put your hand in it, have some shoulder length gloves with liners that crabbers use in AK
    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.

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    Re: how slow can slow be

    Quote Originally Posted by linen
    What is your TA? Higher TA will cause quicker ph drift up.
    [/quote]


    TA is 60
    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.

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