Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 18 of 18

Thread: FC won't stay up, but water clear ?

  1. Back To Top    #1
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    FC won't stay up, but water clear ?

    I have shocked as directed by pool store over and over and gone through a $100 bucket of calcium chloride(? ) and still the FC level is 0.2-0.4. I have given up on the stores help and want to figure this out! Bought the test kit recommended here. I added one gallon of bleach and the next evening the FC level was the same.

    FC - 0.4
    CC - 0.4
    PH - 7.4
    Alk - 100
    CA - 230
    CYA - 67

    My plan was to slam it, but the cc is under 0.5 so does it really need it? Water is clear I have seen a bit of green on the ladder steps no where else. I am having a graduation party at my house next Sunday and want to have the pool safe to swim in!

    Also if I need to add lots of bleach do I add it all to the skimmer?
    Last edited by MoodyMaMa; 05-16-2015 at 05:19 PM. Reason: Additional question
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  2. Back To Top    #2

    Join Date
    Mar 2015
    Location
    Southern Florida
    Posts
    23

    Re: FC won't stay up, but water clear ?

    I'll wait for the experts to answer most of that, but no you do not pour chlorine/bleach into the skimmer. In my plaster pool I pour the chlorine/bleach in front of a return with the pump running at a high speed.

    I also wouldn't worry about your CC, I would figure out the appropriate FC level for a CYA of 70 and start SLAMing. Since you have a liner you don't want to just dump bleach/chlorine in, but use poolmath to figure out approximately how much you need to add to get to a FC level a bit above that SLAM level but below the mustard algae level, then measure the FC level about a half hour after adding it to figure out how you did.
    17k gal, Florida Gem "Double Sky Blue", 11018 Intelliflow VS, Hayward C1750, Autopilot Nano+ SWG, Rheem 6350ti 117kbtu hp, Hayward Colorlogic light (12v)

  3. Back To Top    #3
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
    Posts
    4,926

    Re: FC won't stay up, but water clear ?

    Hi MoodyMaMa,
    welcome to TFP

    First off, forget EVERYTHING the pool store told you.
    Why? Because with a vinyl pool, you dont even need calcium in it. There is zero chemical reaction between Vinyl and Calcium.
    Unfortunately, like so many others, you have been 'pool stored'.

    Ok, with that off my chest. (grrr on that pool store).

    If your water is clear. Thats good.
    If your CC is .5 or less (one drop to go clear) Thats good.
    Next, do the overnight chlorine loss test.
    When the sun goes down, test.
    Before the sun comes up in the morning, test.
    If your OCLT is 1 or less, then no need to slam.
    If you loose more than 1 FC - slam.

    But First, get some chlorine in your pool. Its way to low. The FC to keep your pool clean is based on your CYA level. With CYA of 67 (lets call it 70) your target FC is 8. Thats what you need to keep your FC at. Here is a link to the FC/CYA chart.

    http://www.troublefreepool.com/conte...art-slam-shock
    ONLY use liquid chlorine (bleach from Walmart or wherever) or Salt Water Generator as your primary chlorine source.

    Do you know how to use Pool Math? You need this to determine how much stuff to add.
    At top, enter your volume of the pool *at bottom of pool math, you can calculate volume* 20x20x(3+9/2) = 10600 gallons
    [I added your shallow end and deep end and then divide by 2 for average depth]

    Ok, so enter volume
    In the boxes on the left side, enter test result
    In the boxes to the right of it, enter your recommended level, and click the caluclate button. Pool math will tell you how much of something to put in. Its pretty much that simple.

    Pool Math
    http://www.troublefreepool.com/calc.html

    Recommended Levels
    http://www.troublefreepool.com/conte...mmended-levels

    I hope this helps.
    Quote Originally Posted by MoodyMaMa View Post
    I have shocked as directed by pool store over and over and gone through a $100 bucket of calcium chloride(? ) and still the FC level is 0.2-0.4. I have given up on the stores help and want to figure this out! Bought the test kit recommended here. I added one gallon of bleach and the next evening the FC level was the same.

    FC - 0.4
    CC - 0.4
    PH - 7.4
    Alk - 100
    CA - 230
    CYA - 67

    My plan was to slam it, but the cc is under 0.5 so does it really need it? Water is clear I have seen a bit of green on the ladder steps no where else. I am having a graduation party at my house next Sunday and want to have the pool safe to swim in!

    Also if I need to add lots of bleach do I add it all to the skimmer?
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: FC won't stay up, but water clear ?

    If you have algae on the ladder, you have algae and need to SLAM. With otherwise clear water, it shouldn't take but a day or two. Pull the ladder out and scrub it. Inside the uprights and beneath the steps are common hiding spots. Then put it back in and follow the SLAM instructions.

    Bleach could be tough on the seals inside the filter and pump. Just pour it in front of the return jet - it'll spread just as far as if it came out the return with no risk. If you get on it now, there's no question the pool will be all squared away before next weekend. Probably before Tuesday!
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  5. Back To Top    #5
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
    Posts
    4,926

    Re: FC won't stay up, but water clear ?

    I missed the algae on the ladder part.
    Yes, slam.

    (sorry about that!)
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  6. Back To Top    #6
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    Re: FC won't stay up, but water clear ?

    Ok, beginning to SLAM. My ladder does not pull out, scrubbed as good as I can.
    Added 4 bottles, calculator said 4.5 bottles to get the right amount waited a little over an hour tested the water again
    FC 6.6 cc 2.8 added four more bottles though calculator says 3 should be enough will test once more before I go to bed this time I will test with the 10 ml line instead of the 24 ml line. That was a lot of drops!
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  7. Back To Top    #7
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: FC won't stay up, but water clear ?

    Welcome to TFP!

    One more link to read is the Recommended Pool Chemicals to maintain your pool and how to add them.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  8. Back To Top    #8
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    Re: FC won't stay up, but water clear ?

    So when I test the water, I put the scoop in, swirl till dissolved. Then start adding drops, and swirling, do I stop counting as soon as it turns coulorless? Because it was clear then if I let it sit a few more seconds it looks pinkish. It was clear at 12 drops but then it turned pink just barely, so I kept adding drops and it kept looking clear then turning pink till I was at 50 drops at which point it looked more pink than at 12 drops and I dumped it and started over.

    The cc is at 4.5
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  9. Back To Top    #9
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    Re: FC won't stay up, but water clear ?

    Ok last night I got the FC up to 6 (I think see post above about testing question)
    First thing this morning it's down to (FC)1 and cc is 0.5

    So I can't put more in until evening right? Cause once the sun is up it'll just burn it all off, and seeing as the water is clear is there anything else that could be binding with my chlorine?

    (I know I'm supposed to be getting it up to 24, and I put in the recommended amount of bleach twice last night and only got to 6 an hour after adding bleach!)
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  10. Back To Top    #10
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: FC won't stay up, but water clear ?

    No, don't wait. Every time you test you should bring the chlorine back up to shock level, which for you is 28. I don't see that you have brought it that high yet. You had FC6 an hour after adding the bleach because during that hour the rest of the FC was used killing algae or other things in the water.

    The whole idea is to maintain shock level until everything in the water has been eliminated. The more often you test and adjust, say every hour or two the faster this will go.

    With CYA as high as you have it takes massive amounts of chlorine to SLAM a pool.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  11. Back To Top    #11
    Defgufman's Avatar
    Join Date
    Mar 2015
    Location
    Savannah GA
    Posts
    577

    Re: FC won't stay up, but water clear ?

    Keep it at slam level all the time if possible. It's a war and in war you can't rest till the battle is won
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

    Pool School, Pool Math, CYA to FC ratio chart, Testing Kits

  12. Back To Top    #12
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,706

    Re: FC won't stay up, but water clear ?

    You are already learning a lot! Good job on getting your own test kit and leaving that money hungry pool store behind!

    Get your FC up and keep it up to get rid of what is in your water. Do you have a light? You need to take it out and clean behind it.

    Look in your skimmer and all around it. Some people have found algae on the back of the door.

    Good luck and happy SLAMing!

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  13. Back To Top    #13
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    Re: FC won't stay up, but water clear ?

    What about my testing question, when I tested it last night it turned colorless at 12 drops but then a few seconds later it looked pinkish again, so I kept putting more drops in till I was over 50 drops. Then it looked more pink than it had earlier at 10 drops... So when do I stop?
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  14. Back To Top    #14
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: FC won't stay up, but water clear ?

    Quote Originally Posted by MoodyMaMa View Post
    What about my testing question, when I tested it last night it turned colorless at 12 drops but then a few seconds later it looked pinkish again, so I kept putting more drops in till I was over 50 drops. Then it looked more pink than it had earlier at 10 drops... So when do I stop?
    when it goes clear the first time. If you let it sit it will turn pink again, ignore this.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  15. Back To Top    #15
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: FC won't stay up, but water clear ?

    It is important to keep the FC level up at shock level as much as possible, especially in the beginning. Test and add bleach every 2-3 hours or as often as you can.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  16. Back To Top    #16
    MoodyMaMa's Avatar
    Join Date
    May 2015
    Location
    Kamiah Idaho
    Posts
    22

    Re: FC won't stay up, but water clear ?

    Ok, we got the FC level above 30 yesterday morning and by bedtime it was 24 with CC at 0.5. This morning my test results were 23.5 and 0.5 and yes the water has stayed clear the whole time so I'm done SLAMing, at what level is it safe to swim in?
    And once it gets down to the right level, how do I keep it there, the tabs have stabilizer in them so I don't want to use them for a long while I assume. Do I just add a little bleach everyday? Is there no automated way to do that?
    bullfrog hot tub R7L 425 gallons
    With an Ozonator
    Using the Bromine system 2 step
    Test kit is Taylor K-20006

  17. Back To Top    #17
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,706

    Re: FC won't stay up, but water clear ?

    Bleach/chlorine is your friend. You will need to "feed" your pool every day (or evening like I do). You will learn your pool and what it wants every day. Sunny days=more FC, cloudy day=less.

    Automated-yes. Do a search for it on TFP. I will also look around and see if I can find you a link when I have a free min.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  18. Back To Top    #18
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: FC won't stay up, but water clear ?

    The three automated ways to add chlorine to you pool without getting the CYA are

    Salt Water Chlorine Generator - you add a measured amount of salt to the water and install the generator in your plumbing return line to the pool this powered device causes a chemical reaction that produces small amounts of chlorine I the water stream

    Liquidator - a tank system that mixes pool water and liquid chlorine in a tank and injects it into the return plumbing line.

    Stenner Pump - a tank system that directly injects liquid chlorine into the return plumbing line.

    I went with the Stenner Pump, but you would need to decide which will work best for your situation. As Kim said, a little searching on the forum will bring up multiple threads.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

Posting Permissions

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