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Thread: First TEst with TF-100

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    Davidp's Avatar
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    First TEst with TF-100

    Well I thought I had the pool boy thing under control, looks like I need some help...

    Salt - 3900
    FC - 3.5
    CC - 0
    TC - 3.5
    CH - 1250
    TA - 100
    CYA - 50
    PH - 7.5

    Also noticing some small algae spots in a few places, not many but scattered.

    All help appreciated...thank you!
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Mod Squad jblizzle's Avatar
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    Re: First TEst with TF-100

    The only thing really appearing to be off.is the high CH, which is only lowered by replacing water.

    Your CYA could be higher for the SWG, but with algae showing up, you need to SLAM before raising it.

    Really the CH that high is going to be a problem leading to calcium scaling.
    Jason, TFP Moderator
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    Davidp's Avatar
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    Re: First TEst with TF-100

    Thank you, can I SLAM before lowering CH?
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Richard320's Avatar
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    Re: First TEst with TF-100

    Welcome!

    Are you sure about that CH result? I'd expect you'd have patches of scale causing road rash when you brush against the walls. Did you run the test with 10 ml of water or 25 ml of water? It's easy to get confused with some tests being done at 10 and others at 25. I've made that mistake myself more times than I'd care to count.

    Did you mix until your arm turned to overcooked spaghetti? That Ch test really needs a lot of mixing. A lot. I use a speedstir, and even with that, it takes me at least 5 minutes to run the CH test to the end with CH around 800.

    Did you use Cal-hypo to chlorinate? That's a powdered chlorine sold in buckets. It could be the source.

    At any rate... if that reading is correct, I see a partial drain in your future. So be sure of that reading.

    Algae is also a concern. If you only have a little bit, a good brushing and performing a SLAM should take care of things in a day or two.
    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!

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    Davidp's Avatar
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    Re: First TEst with TF-100

    I will re-test again to make sure of the CH reading. Was my first time using it, so it is definitely possible I added the wrong amount of water, and my mixing could have been weak. I have only used a few pucks on occasion if chlorine is low. Will repost reading. I have constantly been brushing the algae when found, but the dots seem to creep back slowly. Thank you.
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Davidp's Avatar
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    Re: First TEst with TF-100

    Second test using 10ml of water for sure, and a good mixing. I counted 44 drops to turn water blue. So now I have a reading of 1100. Of course kinda hard keeping count when the drop count is that high, and kids asking questions constantly...
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Richard320's Avatar
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    Re: First TEst with TF-100

    Quote Originally Posted by Davidp View Post
    Second test using 10ml of water for sure, and a good mixing. I counted 44 drops to turn water blue. So now I have a reading of 1100. Of course kinda hard keeping count when the drop count is that high, and kids asking questions constantly...
    That means it's probably lower. You were only gone 15 minutes. You didn't swirl long enough. When I switched from manual swirling to the speedstir, my Ch reading dropped about 200!

    Nonetheless, a partial drain is in your future. Try testing your tap water. That will help you figure out how much to replace. Draining half won't get you to 550 unless the tap water is zero. You probably ought to plan on doing it in stages, so the pool is never closed and the kids can't get in. I use pool water on the lawn. It's your call whether you want to replace some water first to lower CYA to make the SLAM level lower, or SLAM at 50 and then slowly lower CH over several months.
    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!

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    Davidp's Avatar
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    Re: First TEst with TF-100

    Ok, thank you!
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Davidp's Avatar
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    Re: First TEst with TF-100

    Ok I'm ready to start the SLAM, readings are:

    FC - 1
    PH - 7.6
    CYA -40-50 (I'm not sure I quite have the hang of this test yet)
    Salt - 3900

    I don't think I have enough bleach on hand though.. And let me ask a dumb question, while SLAMing do you run the SWG along with the pump?

    Thank you
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Mod Squad jblizzle's Avatar
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    Re: First TEst with TF-100

    You can, but we usually suggest just shutting it off. Lower the pH before you start.
    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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    Davidp's Avatar
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    Re: First TEst with TF-100

    I am headed into 2 1/2 days of SLAMming and today when doing the chlorine test, the pink used to turn to a cloudy clear, but it turned to a crystal clear. What does that mean? I have been maintaining 24-26 FC.

    Thank you
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Richard320's Avatar
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    Re: First TEst with TF-100

    Quote Originally Posted by Davidp View Post
    I am headed into 2 1/2 days of SLAMming and today when doing the chlorine test, the pink used to turn to a cloudy clear, but it turned to a crystal clear. What does that mean? I have been maintaining 24-26 FC.

    Thank you
    It sounds like progress.
    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!

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    Mod Squad jblizzle's Avatar
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    Re: First TEst with TF-100

    Not sure, never seen it go cloudy before. The FAS-DPD is always clear for me.
    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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    Davidp's Avatar
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    Re: First TEst with TF-100

    Not sure, water looks great. Chlorine level keeps dropping though. Current readings:
    FC - 17.5
    CC - 0
    Salt - 3900-4000
    CYA - 40
    TA - 100
    PH - 8.2

    Going to add some acid and stabilizer to try and get those two balanced.
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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    Mod Squad jblizzle's Avatar
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    Re: First TEst with TF-100

    You can not test the pH when the FC > 10ppm it will read artificially high.

    You also should not add CYA until after you complete the SLAM.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Davidp's Avatar
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    Re: First TEst with TF-100

    Ok, thank you.
    2007 install, 27,000 gallon, IG, plaster, Pentair CCP320 cartridge filter, 2HP pump
    Circupool RJ45 SWG, Polaris 3900

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