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Thread: Testing my tap water..

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    Testing my tap water..

    Hi, hopefully getting my pool installed soon (you may have seen my "rain rain go away" rant last week...it's still an issue).

    Decided to try out the TF-100 kit though on my tap water. Do these numbers look legit?

    CL= 1 (left side of tester)
    PH= 8.2 (right side of tester)
    FC= 1 (2 drops)
    CC= 1.5 (3 drops)
    TA= 140 (14 drops)

    The FC+CC doesn't appear to equal the TC, is that a user error?

    I've plugged the numbers into the calculator, any advice on where to start? Just wanting to check before I get too carried away.

    Thanks as always!
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

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    Guest

    Re: Testing my tap water..

    Quote Originally Posted by thenikeman
    Hi, hopefully getting my pool installed soon (you may have seen my "rain rain go away" rant last week...it's still an issue).

    Decided to try out the TF-100 kit though on my tap water. Do these numbers look legit?

    CL= 1 (left side of tester)
    This test needs to sit for a minute or two to fully develop so that is why it might have read lower than the titration test. Also it is not as precise so there is going to be some variation. It is really designed for a quick daily check to see if there chlorine is about where it should be. The drop test should be used weekly.
    PH= 8.2 (right side of tester)
    FC= 1 (2 drops)
    CC= 1.5 (3 drops)
    TA= 140 (14 drops)

    The FC+CC doesn't appear to equal the TC, is that a user error?

    I've plugged the numbers into the calculator, any advice on where to start? Just wanting to check before I get too carried away.

    Thanks as always!
    Any reason you didn't test calcium hardness? You should know that number also.
    First thing I would do is lower your pH to 7.5 and then retest the TA.

  3. Back To Top    #3

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    Thanks. I didn't test the calcium because I thought that was only important on non-vinyl liner pools. I will run a test tomorrow to see what that figure will be. And CYA is definetly 0, correct?
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

  4. Back To Top    #4
    Guest
    If you have not added any CYA it will be 0. It is not found in tap water unless the water has become contaminated.
    Calcium is not needed for vinyl pools like it is for plaster or fiberglass BUT it is important to know your calcium levels. Very high levels could lead to scaling conditions and many parts of the country have very hard water. Very soft water has a tendency to foam more than hard water. If you calcium is below about 120 ppm you might want to bump it up a bit. If it is above about 300 ppm you want to keep close watch on your pH and not let it rise about about 7.8 so you don't create conditions favorable to scaling.

  5. Back To Top    #5

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    Gotcha, good explanation. I will post the calcium level tomorrow. Already in bed, typing this on my smartphone

    Thanks!
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

  6. Back To Top    #6

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    Tested for calcium hardness this morning, and it appears to be in the 120-130 range (12-13 drops). Will this be any concern for me?

    Thanks!
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

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    Guest
    No, it's pretty much the 'sweet spot' for a vinyl pool.

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    Quote Originally Posted by waterbear
    No, it's pretty much the 'sweet spot' for a vinyl pool.
    Cool!

    How does this order / quantity sound, to begin treating my new fill water once it arrives(basing this on 16000 gallons):

    The Pool Calculator is saying to add 35oz of muriatic acid to lower my ph to 7.5. So do that first, then add 66oz of 6% bleach to raise the FC to 3. Then begin adding stabilizer to raise CYA to around 40, it says 5 lbs 5 oz, should I start with about 3lbs first (and then test a week later)?

    I just want to make sure that I'm adding chemicals in the correct order and not overshooting the quantities too early on. For the most part, these can be added every couple hours apart right, while running the pump 24/7 for a couple days?

    Thanks for the advice thus far waterbear!
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

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    Look's like it's going to be sometime next week now....going on a month delay now due to weather.

    So, anyone have any insight on my last post in the mean time?

    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

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    duraleigh's Avatar
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    That plan works fine.

    the muriatic can be distributed into the pool virtually simultaneously with the chlorine.....one right after the other in no particular order.

    Likewise, the stabilizer can go in to new pool water along with the chlorine and muriatic....no need to spread them apart.

    I'm slightly more agressive on the dosages. I would personally do about 80% of the calculated dosage and then test and adjust. (Most of the time, you'll get a reading on CYA in 2-3 days.....sometimes it's a little longer)

    You are wise to prepare in advance....you're water will stay sparkling all summer.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  11. Back To Top    #11

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    Thanks Dave. So just add all 3 chemicals like stated, and then re-test? Just wondering how much my other numbers would adjust, like the TA, although I need it to come down a bit anyways.
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

  12. Back To Top    #12

    Join Date
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    Location
    East of KC, MO
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    Re: Testing my tap water..

    The day has finally come... the pool is getting installed tomorrow!!!

    After over a month delay due to weather, etc, they will be out here at 7am to get it started. There is a chance of rain/storms tomorrow evening, but they should have it up by then, and I will take all the rain I can to help with fill water!

    I will be taking pics throughout the process and will post my fill numbers up ASAP, to run them by you all before I add anything, just to make sure I start it off correctly!

    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

  13. Back To Top    #13

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    Re: Testing my tap water..

    OK, so I lied last week when I said the pool will be completed...it finally got completed yesterday...GEEZ! Will get into that later. I will be going to the pool store tomorrow to get my water tested so they can give me "their chemicals" plus have to pick up a pressure hose and a few other misc. items. BTW, I am going with the BBB system still, just have to act like I am going with chlorine

    I will probably be posting my test numbers one more time tomorrow, to make sure I am correct in what to add. Question now is, since I have straight tap water, how long do I need to run by pump once I add the chemicals? Do I start off running it only 12 hrs a day (split up perhaps) or do I need to run it continuously for a couple days? Was just wondering...thanks!
    27ft Above Ground Pool, 52" walls, vinyl liner
    1hp Pentair pump system
    22.5" Pentair sand filter
    BBB is stocked up!!
    TF-100 test kit

  14. Back To Top    #14
    JasonLion's Avatar
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    Re: Testing my tap water..

    If the water is clear, start with 12 hours a day and then adjust from there.
    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

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