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Thread: results from tf-100 kit: what to do next

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    results from tf-100 kit: what to do next

    30,000 gallon plaster pool with de filter

    PH: 7.2
    FC: 10
    CC = 34
    TA = 150
    CYA = 20

    What next? I guess to add stabilizer to increase CYA??
    Is it safe to swim with high CC level?
    Also, I see some pink stuff in spots.
    Help is much appreciated!
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    Mod Squad Bama Rambler's Avatar
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    Re: results from tf-100 kit: what to do next

    Welcome to TFP.

    How are you testing?
    Do not add any CYA until you pass the shock process.

    How did the FC get that high? What have you been adding to the pool?
    What does the water look like?

    I wouldn't recommend anyone swimming in water with that much CC.
    Dave J. TFP Moderator
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    Re: results from tf-100 kit: what to do next

    we've been adding about 5 gallons of liquid chlorine each day to fight a bad algea problem. Pool has improved from green to light teal color. we also use 3 inch tabs in chlorinator. i guess we should stop adding liquid chlorine?!
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    GreatCanadian's Avatar
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    Re: results from tf-100 kit: what to do next

    No. Use the liquid chlorine (or bleach). Stop using the tabs. Have you been adding the liquid chlorine all at one time?

    Stay tuned, you will be redirected to Pool School!!
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
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    Mod Squad jblizzle's Avatar
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    Re: results from tf-100 kit: what to do next

    Being new to the kit ... any chance you want to describe how you did the FC and CC FAS-DPD test? Those are some serious CC #s and perhaps we should make sure the test was done correctly.
    Jason, TFP Moderator
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    Re: results from tf-100 kit: what to do next

    Should I stop all chlorine at this time (both liquid and tab) until numbers come down.
    Yes, we were dumping in 5 gallons of liquid chlorine each night to fight algea.
    Jason, I followed stes on the white card for dpd. Perhaps i should do it again since numbers are so high?
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    GreatCanadian's Avatar
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    Re: results from tf-100 kit: what to do next

    You can't stop adding the chlorine. What you need to do is maintain your chlorine at shock level, which means you need to add chlorine frequently, perhaps every hour at the beginning of the shock process. If your CYA level is 20 you need to raise your FC level to 10. Take another reading an hour later and bring it back up to 10. I'm doubtful of your CC reading of 34. Is your pool covered?
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

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    Mod Squad jblizzle's Avatar
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    Re: results from tf-100 kit: what to do next

    I was hoping for specifics to see if something was off ... like how much water did you use? how much powder did you use? How many drops did it take for FC and then CC?

    It would not be the first time that someone new to the kit used the wrong multiplication factor for the water sample.
    Jason, TFP Moderator
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    Re: results from tf-100 kit: what to do next

    thanks for the help everyone. This is frustrating.

    Jason,
    When doing the chlorine drop test, I added R- 871. Should I do this until sample stays clear or only clear upon swirling?
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    Mod Squad jblizzle's Avatar
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    Re: results from tf-100 kit: what to do next

    Lots of detailed information in this Sticky:
    extended-test-kit-directions-t25081.html#p206393

    It should turn completely clear ... it may turn pink again if you let it sit for a few minutes, but you should do the test faster than that.
    Jason, TFP Moderator
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    Re: results from tf-100 kit: what to do next

    OK. I did make a mistake. I did tests again. Here are results.

    Ph: 7.2
    FC = 10
    CC = 9
    TA = 150
    CYA = 0 (The black dot in tube never disappeared)

    Now what?
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    Mod Squad jblizzle's Avatar
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    Re: results from tf-100 kit: what to do next

    Those are still some significant CC numbers ... anything more than 1 drop requires going through the shock process.

    First, add enough CYA to get to about 30ppm. Then, start the shock process until you pass the 3 tests to stop.

    Note with the high CC values, the FC is going to be consumed VERY quickly to start.

    Did you have CYA last year? Did you just open the pool? Do you always have a cover on it?

    You are at least a few days (more likely a week +) from the pool being safe to swim in.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: results from tf-100 kit: what to do next

    we just opened the pool 1 week ago and didn't add any CYA. WE are new pool owners. According to my FC numbers, aren't I already in the shock process?
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    Mod Squad jblizzle's Avatar
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    Re: results from tf-100 kit: what to do next

    Was it a new pool or existing pool? The reason I ask is there are some reports of CYA being converted by bacteria into ammonia in closed pools over the winter. This also usually results in showing high CC numbers. Just trying to get a feel if that is what is going on.

    In any case, chlorine is the answer.

    Technically you are in the shock process if you are maintaining that FC level every hour or so. But, you would likely benefit from adding some CYA to protect the FC or the sun is going to be breaking down a lot of the chlorine you are adding.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: results from tf-100 kit: what to do next

    This is an existing pool that was closed for the winter. WE replaced the fence around the pool and didn't open until end of july (we live in PA).
    I have seen spots of pink stuff (I've read this is a bacteria).
    For the chlorination/shock process, we've been using 3 inch tabs, plus dumping 5 gallons of liquid chlorine in at night. IS this ok? Should i increase of decrease this?
    Or, raise CYA first?
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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    MikeInNH's Avatar
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    Re: results from tf-100 kit: what to do next

    Please do yourself a favor and read the pool school link on the top right. Specifically the shocking process under "how to". You will need to maintain your shock number, currently 10 until the criteria is met. This may mean really upping the chlorine level at night so it's not all gone in the morning. If you raise CYA then your shock number will also need to go up, that's listed in the pool calculator on how to get your shock number. If you want this to go relatively quickly you will need to be vigilant on keeping the shock number above 10 for the CYA you currently have.

    BTW, welcome to TFP!
    Mike
    2007 1st full year with AG pool~15k gallons 18'x33' JW
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    NikiBelle's Avatar
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    Re: results from tf-100 kit: what to do next

    Hi and welcome to the site!!!! I'm sorta new myself. Just wanted to give you a shout out and say ROCK ON!!!!

    Just of note that teal color, that is usually milky looking, is dead algae. It's gross isn't it? Check that water every hour if you can and raise back up to shock level when needed, it's the fastest way!!!! Try to not just add at night, add every hour when you can!!!
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    GreatCanadian's Avatar
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    Re: results from tf-100 kit: what to do next

    Jk1976, what kind of filter do you have?
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

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    Re: results from tf-100 kit: what to do next

    we have a hayward 480s DE filter. I think it's old, maybe 10-20 years. I think we need to replace it.
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

  20. Back To Top    #20

    High CC level

    Merged topics to maintain history. Butterfly

    I would appreciate some help. WE're new pool owners and struggling with this.

    Pool: 30,000 gallons, plaster, in ground, de filter

    Using taylor test kit with dpd method:

    9:30 pm
    1= FC
    9 = CC
    6.8= Ph
    60= CYA
    130 = TA

    3:30 AM
    1 = FC
    4 = CC
    6.8 = ph

    Should I shock again to lower CC level? Increase PH before shocking? Drain water to lower CC (though it's lowering without this? My calculations show that i need to add a LOT of chlorine to hit breaking point. I have tri-chlor shock. Any help is much appreciated!
    30,000 gallons, DE Hayeward Filter, Plaster, In-ground
    WE keep the Chlorinator filled with tabs

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