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Thread: Testing Results Having trouble with Calcium

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    Testing Results Having trouble with Calcium

    Last weekend my pool turned green so I added Algeicide and 5 lbs of shock. Normally Algeicide does the trick throughout my few years of being a pool owner however this time it did not. I did not have a test kit because for the most part of the last 2 years my pool has been clear and blue. After reading some posts I decided to put put 12 gallons of liquid chlorine into my pool. Now my pool is back to blue after the week but still a little cloudy. I can see the bottom of the deep end but it is not 100 % clear. I receieved my td-100 kit yesterday and here are my results

    FC-45
    CC-0
    TA-250 This one turned yellow at 25 drops. I am asssuming it wont turn red because of my high chlorine
    pH-7.8
    CYA-135

    Now to the CH testing. I could not get the water to turn blue. It turned clear after 50 drops of the r-0012. 300 drops later and it still hasnt turned blue. I need help.
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    Patrick_B's Avatar
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    Re: Testing Results Having trouble with Calcium

    Welcome to the forum

    Well you've gotten ahead of yourself here. It does sound like you needed to SLAM, but there is a procedure. I suggest lowering your Cya way down by drain and refill until it's a reasonable level of 30-40. Otherwise, you will be spinning your wheels. That is too high a stabilizer level to SLAM with. Get it down there first, and let's work it from there. Take some time to review the slam procedure while you are getting this done. It will no doubt help with your other levels which really need to be addressed later. Until this is under control it will be a rough go getting and keeping the pool clear.
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    Re: Testing Results Having trouble with Calcium

    First, welcome to TFP!

    Glad to see you got the Cadillac of test kits, that makes things much easier going forward.

    How did you get a CYA reading of 135? The test only goes to 100 so that seems like a very odd result.

    With an FC of 45 the pH test does not work correctly and I am guessing the CH one was affected as well. Best to wait until you are able to drop your FC before taking another set of pH, TA, and CH tests.

    We still need to know how you got your CYA number, but assuming that is correct you will need to reduce that quite a bit. It also sounds like you just dumped a bunch of chlorine in to the pool, which can be very dangerous to the pool and equipment. The method taught here is SLAM, where you raise the FC level to a specific level and hold it there until the water is clear and tests show that everything growing is gone. You can read about it here: Pool School - SLAM - Shock Level And Maintain
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    Richard320's Avatar
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    Re: Testing Results Having trouble with Calcium

    I suffer from astronomical Calcium as well. I feel your pain. If you don;t yet own a speedstir, get one. It makes CH testing a whole lot easier and accurate. My CH reading dropped 200 just by using the speedstir when I test!

    That said, my method...

    10 ml sample. 5 drops R-0012 and mix a minute. 10 drops R-0010 and mix 30-40 seconds. Then 5 drops R-0011. It makes the color deeper and easier to read than just 3. I think that was your problem. It faded out. Okay, swirl that mix until it's a uniform pink. Then start adding drops of R-0012 while swirling. You can't swirl too much. I tend to drop mine 2 at a time until the color goes to what I call indigo. When it gets to that color, swirl an extra minute. Sometimes that will push it to blue. If not, resume counting one drop at a time and swirl between drops until your wrist is sore. It will turn sky blue at some point. And if at any point it gets too pale to see, add another drop of R-0011.
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    Re: Testing Results Having trouble with Calcium

    I got the cya reading based on the instructions with the test kit. I couldnt see the black dot well before the water reach the 100 mark on the tube so I just guessed it was 135.

    How would I drop my FC level and where do I need to drop it? Yes that is what I did dumped a bunch of chlorine in the pool thinking it would be the trick. I was worried the water would have gotten worse.

    Should I wait to retest my CH level the Richard320 way?
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    Re: Testing Results Having trouble with Calcium

    Quote Originally Posted by 520wilbur View Post
    I got the cya reading based on the instructions with the test kit. I couldnt see the black dot well before the water reach the 100 mark on the tube so I just guessed it was 135.

    How would I drop my FC level and where do I need to drop it? Yes that is what I did dumped a bunch of chlorine in the pool thinking it would be the trick. I was worried the water would have gotten worse.

    Should I wait to retest my CH level the Richard320 way?
    If you want to know the CH, that's how to do it.
    CYA dilution test is given in Extended Test Kit Directions Post 8, Step 9.

    If you intend to SLAM to get rid of algae, you'll need to drain off some water to lower the CYA.
    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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    Re: Testing Results Having trouble with Calcium

    I re tested your way Richard and it still wouldnt turn blue after 100 drops. After 100 drops I dropped 1 drop of r-0011L it did turn blue. I am still at a lost with with test. Like I said earlier the water turns clear after about 50 drops of r-0012. I am almost out of r-0012 trying to do this test. I am going to re try the cya now.
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    Richard320's Avatar
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    Re: Testing Results Having trouble with Calcium

    Remember to take multiple readings of the CYA test to be sure. Just pour it back and forth.

    If you do end up draining a bunch, don't worry about the CH test now, because it will be different after refilling.
    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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    Re: Testing Results Having trouble with Calcium

    Yes I did multiple cya tests. I did the straight pool water in the viewing tube and I could see the black dot. Should I just drain the whole pool or a certain amount?
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    Re: Testing Results Having trouble with Calcium

    Quote Originally Posted by 520wilbur View Post
    Yes I did multiple cya tests. I did the straight pool water in the viewing tube and I could see the black dot. Should I just drain the whole pool or a certain amount?
    CYA is evenly mixed in the pool water. If you're at 140 and you want to be at 50, you drain off 90/140 or 64% If you know your average pool depth, it is just simple arithmetic.
    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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    Re: Testing Results Having trouble with Calcium

    New results after I drained about 15k.

    pH-7.8
    FC-16
    cc-0
    ch-575
    ta-170
    cya-100

    2 things one is this ok to swim in? Also I am at a lost for the cya level. What should I do next?
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    Richard320's Avatar
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    Re: Testing Results Having trouble with Calcium

    Quote Originally Posted by 520wilbur View Post
    New results after I drained about 15k.

    pH-7.8
    FC-16
    cc-0
    ch-575
    ta-170
    cya-100

    2 things one is this ok to swim in? Also I am at a lost for the cya level. What should I do next?
    If you can see the bottom of the pool, technically I'd guess it's safe to swim. People swim in lakes that are a lot greener with algae. However, I've become a pool snob and I hesitate to even get ion a cloudy pool.

    Ideally, you'd replace some more water to get CYA reasonable and then SLAM the pool. Until you kill it all, the algae is going to just keep growing until you have a gooey swamp.
    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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