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Thread: Can I use Basic OTO Test for Bromine?

  1. Back To Top    #1

    Join Date
    Apr 2013
    Las Vegas, NV

    Can I use Basic OTO Test for Bromine?

    It may be a little OCD, but I want to test the bromine level (and maybe other stuff) for the private hot tub when I am on vacation using my timeshare. Anecdotally, I've heard that the maintenance of those can be a little off. I use chlorine at home and I don't really know a whole lot about bromine and above ground spas. My understanding is that they are using bromine, though I will double check that. Can I use the Chlorine reagent in the Taylor Basic OTO test, for Bromine testing, or do I need to buy a different reagent? I also have the full test kit, so if that would be more suitable, I can bring that with me instead. What kind of number range am I looking for?
    11k gal IG plaster pool w/spa (15x28 "freeform" oval), Blue Haven Pools cartridge smartfilter 550, Jandy VS FloPro 2.0hp pump, Laars Lite2 400k BTU gas heater, probably built 2004
    Dolphin Evolution X5 robotic cleaner, TF-100 Test Kit

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Can I use Basic OTO Test for Bromine?

    The same test dyes are used for chlorine and bromine tests so yes, you can use your OTO test if you like or you can use a DPD test or even a FAS-DPD test. Just multiply your chlorine result by 2.25 to get the bromine result. Note that you can only really test for Total Bromine and cannot distinguish Free Bromine from Combined Bromine (because the Combined Bromine reacts with the dye, unlike combined chlorine).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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