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Thread: First TF100 test..

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    Join Date
    Jun 2012
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    Escondido, CA.
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    First TF100 test..

    I got my new test kit Saturday and went out and performed the daily quick test.. and got unexpected results.

    My pH was 8.2 and my chlorine didn't even register.. of course the surface temp of the water is 39deg and its been raining off and on here for a few weeks now.

    See any problems?

    I'll do a more in depth test later.. I'm still using a "Pool Guy".. so its on him to fix
    Escondido Ca [*]~23000 gallon plaster pool built in the 70's[*]Pentair VF Pump running 10hrs at 1800rpm getting and estimated 35-40 GPM thruput[*]Sta-Rite Cartridge filter

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    Re: Should I be worried with PH levelsin cold water?

    Quote Originally Posted by JasonLion
    Most pools most of the time can be left alone over the winter, ie no PH adjustments. .......

    However, it is important to be aware that the PH shifts up naturally as the water gets colder, so you do not want to adjust the PH nearly as low as you normally would. If the water is down around freezing you want the PH as much as 0.4 higher ........
    Ha.. I tested (chlorine and pH quick test) my pool (for the first time myself) this weekend and found my pH to be up at 8.2... but its been raining AND the water temp is 39deg.. but subtracting out the.4 for cold water brings my pH right back within normal levels...
    Escondido Ca [*]~23000 gallon plaster pool built in the 70's[*]Pentair VF Pump running 10hrs at 1800rpm getting and estimated 35-40 GPM thruput[*]Sta-Rite Cartridge filter

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    JasonLion's Avatar
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    Re: First TF100 test..

    The PH tends to be higher when the water is cold, and that is usually fine. The one tricky aspect here is that the standard PH test will report any PH over 8.2 as 8.2. If your PH is 8.2, then fine, but if it is a lot higher that could be a problem. Unless you have fresh plaster in the last four or five months I wouldn't worry about the PH.

    Chlorine at zero is normal when the pool is winterized/covered, but you don't want it to be zero if the pool is being kept open over the winter.
    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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    Mod Squad jblizzle's Avatar
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    Re: First TF100 test..

    Also make sure your pump is run at least an hour before you take the water sample to ensure that the water is sufficiently mixed.
    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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    linen's Avatar
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    Re: Should I be worried with PH levelsin cold water?

    Quote Originally Posted by BitViper
    Ha.. I tested (chlorine and pH quick test) my pool (for the first time myself) this weekend and found my pH to be up at 8.2... but its been raining AND the water temp is 39deg.. but subtracting out the.4 for cold water brings my pH right back within normal levels...
    Be aware that the ph tests reads everything above 8.2 as 8.2, so you could be higher. Probably not an issue, but just thought I would mention it to you.

    EDIT: just saw JasonLion responded the same thing in your thread. It would be helpful if you keep you questions/comments relating to your post in your post

    Topics merged. JasonLion
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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