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Thread: Are these numbers correct?

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    Are these numbers correct?

    Just did a test

    FC 4
    Cc 0
    TC 4
    Ph 7.5
    TA 110
    Ch 220
    Cya 65

    I'm using the TF 100 kit. The reason why I ask is because when I did the 5 drop test with the R600 it showed about 1 in chlorine but the R870 test tells me it's at 4?
    Inground kidney plaster pool 30x17 with hayward superstar clear cartridge filter system, sta-rite max-e-pro 2 hp pump.

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    Mod Squad jblizzle's Avatar
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    Re: Are these numbers correct?

    Trust the FAS-DPD. Too hard to actually distinguish the shades of yellow.

    CYA is a little on the high side, but livable ... although with that CYA, your minimum FC level is 5ppm.
    Jason, TFP Moderator
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    BoDarville's Avatar
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    Re: Are these numbers correct?

    I would trust the numbers obtained with the R-870 powder (FAS-DPD). Just to be clear, when you say you got an FC reading of 4 using the FAS-DPD, you first added the R-870 powder to the sample and then added 8 drops of the R-871 get the sample to turn clear to arrive at FC of 4, right?
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    Re: Are these numbers correct?

    Quote Originally Posted by BoDarville
    I would trust the numbers obtained with the R-870 powder (FAS-DPD). Just to be clear, when you say you got an FC reading of 4 using the FAS-DPD, you first added the R-870 powder to the sample and then added 8 drops of the R-871 get the sample to turn clear to arrive at FC of 4, right?

    Yes FC was 1/2 of 8
    Inground kidney plaster pool 30x17 with hayward superstar clear cartridge filter system, sta-rite max-e-pro 2 hp pump.

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    Re: Are these numbers correct?

    Quote Originally Posted by jblizzle
    Trust the FAS-DPD. Too hard to actually distinguish the shades of yellow.

    CYA is a little on the high side, but livable ... although with that CYA, your minimum FC level is 5ppm.

    Pool school says 30-50 and TF testers says 30-80. Which one to follow?
    Inground kidney plaster pool 30x17 with hayward superstar clear cartridge filter system, sta-rite max-e-pro 2 hp pump.

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    Mod Squad jblizzle's Avatar
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    Re: Are these numbers correct?

    Non-saltwater pools use the 30 to 50 ppm recommendation.
    Jason, TFP Moderator
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    Re: Are these numbers correct?

    What about the other numbers...do they seem ok?
    Inground kidney plaster pool 30x17 with hayward superstar clear cartridge filter system, sta-rite max-e-pro 2 hp pump.

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    Mod Squad jblizzle's Avatar
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    Re: Are these numbers correct?

    Sure. TA is a little high but nothing to worry about.
    Jason, TFP Moderator
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    BoDarville's Avatar
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    Re: Are these numbers correct?

    Your other numbers look fine. Just keep an eye on CH. It is borderline low for a plaster pool. However, since CH often increases due to water evaporation and top-off, it may come up on its own through regular top-offs (water evaporates, but calcium does not). Probably worth your while to check your fill water CH level. If there are noticeable fill water levels of CH, CH levels in the pool will go up any time you add water to replace evaporation. However, if the CH level drops from current levels, I would increase it to around 250 ppm.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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