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Thread: Pool Chemistry Conflict TF-100 vs. pool store

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    Join Date
    Jul 2014
    Location
    New York
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    34

    Pool Chemistry Conflict TF-100 vs. pool store

    Hi,

    I am getting consistant differences with my TF-100 and the local pool store (they assure me fresh Taylor test chemicals). I am doing lots of tests as I am in the process of adding salt for a Pentair IC40 install next week.

    My TF-100 Reading:
    CL-5
    PH-7.2 (I have added dry acid twice in the past week to bring it down)
    FC-7
    CC-0
    CH-275
    TA-90

    Pool store readings:
    FC-5 (they don't do the drop test)
    PH-7.8
    CH-175
    TA-100 (close)
    Salt - 2000 (after 6/45lb bags of salt) - I plan to add 3 more which should bring me close to 3400

    I bought my TF-100 last year so all the chemicals should be good, only difference is 15 minutes of sitting in the bottle. Any thoughts?
    21' x 28" Grecian Vinyl Pool with fiberglass steps (@17k gallons) with Pentair SuperfloVS, Hayward sand filter with Zeosand, and Hayward gas heater. Pentair EasyTouch 4PSC-IC40 (Pentair IC40 SWG), and Screen Logic interface. 2 skimmers with main drain on the intake side and two primary returns with two low flow bubbler returns at the stairs. Aquabot pool cleaner. TF-100 Test kit.

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    Mod Squad JVTrain's Avatar
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    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Pool Chemistry Conflict TF-100 vs. pool store

    Trust your results. Stop going to the pool store.

    Mixing pool store testing and pool store advice with TFP methods won't work. If your reagents were stored in a cool, shaded area for most of that time, they are still good.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    needsajet's Avatar
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    Jan 2016
    Location
    Sydney, NSW, Australia
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    3,556

    Re: Pool Chemistry Conflict TF-100 vs. pool store

    +1 to JVTrain. I tried five pool stores with same water to compare and they were all different. I also noticed they use a tray of water to rinse their test blocks and don't change the water. They do CYA with a tablet, their FC doesn't read more than 5, etc. etc.

    Much the same experience. pH OK, TA 2nd best, the rest all hit and miss
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

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    Join Date
    Jun 2015
    Location
    East Hampton CT
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    375

    Re: Pool Chemistry Conflict TF-100 vs. pool store

    Quote Originally Posted by NYAVGUY View Post
    Hi,

    I am getting consistant differences with my TF-100 and the local pool store (they assure me fresh Taylor test chemicals).
    No you're not. The easiest solution is to stop getting your water tested at the pool store. Why get your water tested by a stranger if you have the Cadillac of testing kits and you are intimately familiar with the person (yourself) doing the testing?
    Chris
    17' x 35' outdoor in-ground Grecian shaped w/ vinyl liner. ≈ 21,000 gallons. Hayward S-200 Sand Filter and 1 HP Hayward Super-pump. Other Accessories: slide, light, ladder, fiberglass stairs, TF-100. Baquacil Conversion - June 2015, SLAM How-to, Chlorine/CYA Chart

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