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Thread: How to tell FC levels with TC OTO test?

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    How to tell FC levels with TC OTO test?

    I have the TF100 which is great when needing to shock and test for CC, but I can't imagine using the FAS/DPD test on a daily basis to make sure FC level are maintained. My question is, how can I tell my FC levels from the TC OTO test kit that comes with the TF100?
    24000 Gallons
    Cristal-Flo Hi-Rate Sand Filter
    IG - Vinyl
    3/4 HP Pump, and 44 Flow Rate
    Older than 10 years.

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    Join Date
    Aug 2010
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    Dallas, TX
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    Re: How to tell FC levels with TC OTO test?

    Why not? It's pretty easy to use on a daily basis. But the regular tests work fine when you aren't shocking.

    OTO instructions are here:
    extended-test-kit-directions-t25081.html
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: How to tell FC levels with TC OTO test?

    Yes, I could use it on a daily basis, but with the cost comparisant for refilling the R-0870 DPD Powder & R-0871 (1 oz) Reagent to R-0600 Reagent for OTO Chlorine Test (for TF-100) is around $13, which isn't much, but it would be nice to use the FAS/DPD when needed to make those precise and high measurements and the OTO for everyday use. Is there a way to tell the FC level from the TC OTO test, or is there a certain TC level to maintain much like the CYA to FC level?
    24000 Gallons
    Cristal-Flo Hi-Rate Sand Filter
    IG - Vinyl
    3/4 HP Pump, and 44 Flow Rate
    Older than 10 years.

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    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: How to tell FC levels with TC OTO test?

    The link I posted tells you how to perform the OTO test, and how to get a sense of CC:
    This test measures TC, but if you watch closely it is possible to get a sense of the presence of CC. When you first add the drops of R-0600, the sample will immediately show the FC level. Then, over the next minute or so, it will drift up to the TC level. If you see the color changing, CC is present. Using the test in this way requires careful attention and a good ability to distinguish shades of yellow quickly.

    Other than that, you might want a DPD test, another drop based test.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

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    Re: How to tell FC levels with TC OTO test?

    Ahhh, sorry RobbieH, didn't notice the link!
    24000 Gallons
    Cristal-Flo Hi-Rate Sand Filter
    IG - Vinyl
    3/4 HP Pump, and 44 Flow Rate
    Older than 10 years.

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