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Thread: Ok....really confused here

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    Ok....really confused here

    I put 14 bags of solar salt this morning and it's already dissolved however I just tested my chlorine and instead of it being in the low 20's since I'm slamming the pool, and now it's showing 12.5 FC.....

    Is this to be expected? the water is still crystal clear and aside from me brushing and daily cleaning it has never dropped this sharply before.

    Salt level is 6.4 or 3200ppm according to the salt test strips I got from tftestkits.com.

    Please help!

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

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    Mod Squad woodyp's Avatar
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    Re: Ok....really confused here

    Sun shiny day? Warmer water temps? Anything else stirred up in the pool?
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    JasonLion's Avatar
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    Re: Ok....really confused here

    There isn't any reason I would expect the salt level and the FC level to be particularly related to each other. Are you making some assumption about what the SWG should have been doing that you haven't mentioned?

    How quickly FC goes away is a function of your CYA level, and is a percentage of the starting FC level. When the starting FC level is high, you will lose more chlorine to sunlight than when the starting FC level is lower.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Ok....really confused here

    Sorry i should have put more details it's been overcast all day with light sprinkling of rain very little if no sunlight at all CYA is 60. The SWG hasn't been installed yet. I was planning on doing it tomorrow since yesterday and today it's been lightly raining

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

  5. Back To Top    #5

    Re: Ok....really confused here

    I omitted to mention. I did find two of my plastic chairs in the pool. Wind must have blown them in there. I have no idea how long they may have floating in it. Sound like the likely culprit?

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

  6. Back To Top    #6
    JasonLion's Avatar
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    Re: Ok....really confused here

    Even on an overcast day you will lose noticeable amounts of chlorine to sunlight. Plus there is always the chance that you had just a little algae still hanging on at the start of the day.

    The chairs don't make much difference. It generally takes organic debris (or sunlight) to use up chlorine.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. Back To Top    #7

    Re: Ok....really confused here

    Ok. So I need to go dump 500 or so oz of bleach tonight. Even with my CYA at 60 I was still taken aback of it dropping that sharply. The last 5 days or so it's been similar weather conditions with the loss of max 4 FC. I'm wondering if I should hold off installing the swg until this pool is stable. ..

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

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    JasonLion's Avatar
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    Re: Ok....really confused here

    I would go ahead and do the install, but not start using it significantly until things have settled down.

    Even fairly noticeable differences in the amount of sunlight are difficult to detect visually. It could have been somewhat brighter today. Another possibility is that there was something organic in the salt you added, and you lost some chlorine dealing with that. Such things are rare, but certainly happen.

    Day time chlorine loss never really gives you much useful information. There are simply too many variables and confounding possibilities. It is overnight chlorine loss that tells you all kinds of things.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    pwrstrk's Avatar
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    Ok....really confused here

    Just for the heck of it why don't you do an OCLT test. That'll tell you if you still have something in the water consuming chlorine. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  10. Back To Top    #10

    Re: Ok....really confused here

    Pwr, so just so I understand you want me to leave it at 12.5 tonight and see if there's any chlorine in the morning? Or raise the chlorine to 24 and do an OCLT?

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

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    pwrstrk's Avatar
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    Ok....really confused here

    Go ahead and get yourself up to your SLAM level. Take a test 30 min after you add your bleach so it's mixed in good. See what FC level you are then and then do test in the am before the sun comes up and see if you lost any FC and how much.
    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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    Mod Squad woodyp's Avatar
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    Re: Ok....really confused here

    It doesn't matter what level you leave it at if doing an OCLT. Loss of 1 ppm or better at any level indicates slam not done.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  13. Back To Top    #13
    pwrstrk's Avatar
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    Ok....really confused here

    Both ways work. It's up to you. Woodys way you'll save on bleach. One ppm is one ppm no matter what FC level.
    Did you have a full blown algae outbreak ?
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  14. Back To Top    #14

    Re: Ok....really confused here

    Ok got you guys. I picked up 8 121 oz jugs of 8.25 bleach. My main concern if I leave it at 12.5 and wake up in the morning to a cloudy pool or would that not happen that quickly?

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

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    Mod Squad woodyp's Avatar
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    Re: Ok....really confused here

    You won't "lose" the pool overnite either way.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  16. Back To Top    #16
    pwrstrk's Avatar
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    Ok....really confused here

    + 1 ^^^
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  17. Back To Top    #17

    Re: Ok....really confused here

    Ok woody I like your thinking and thank you for calming my fears I think I'm going to leave it alone tonight at 12.5 since I only have enough reagent for one maybe two more tests. Should have new reagents on Monday from tftestkits.com.

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

  18. Back To Top    #18

    Re: Ok....really confused here

    OK...thanks to my 2yr old for waking me at 6am....I tested the water and it was 12 FC!!! chloromines was .5, water is still crystals clear. So if I may dare to say, I'm done with the slamming yes?

    OK...going back to bed. Will be busy installing the swg in a few hours.

    Brian, Pool newbie in Atlanta, GA. 24k IG vinyl pool, Circupool SI-45 SWG (purchased 3/2014) , Hayward Pro Series Sand filter S220T, Pentair 1hp 2-speed superflow (thanks Jbizzle!), TF-100 test kit w/ SpeedStir
    Removed -> Hayward 1HP Super pump SP-1607-Z1-M

  19. Back To Top    #19
    pwrstrk's Avatar
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    Ok....really confused here

    Sounds like it to me 👍 Your not the only one up. 😎
    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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