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Thread: hot tub question

  1. Back To Top    #1

    Join Date
    May 2015
    Pahoa, HI

    hot tub question

    Good morning,

    I clean and disinfect 2 hot tubs. We use bromine. When draining/refilling or topping off we use non-chlorinated water. Today, I used a chlorinated water source (<1ppm) and the water turned amber... almost yellow, but more golden.

    Is this what happens when chlorine and bromine mix?

    Is there a reason why bromine is being used as a sanitizer? Is there a downside to changing over to chlorine?


    90,000 gallon, in-ground, 3 pumps / sand filters, in-line chlorinator on #2. Learning on the job!

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: hot tub question

    When I ran my spa as bromine for a short time, I would oxidize with bleach all the time. This is the same as adding chlorine to a bromine tub. Never had any signs of the water changing shades or a yellow color. Yellow or amber or orange color can be an indicator of metals such as iron in the water when the pH is relatively low, such as low 7s. Is there a chance of metals contamination in the water you added?

    Bromine and chlorine are both acceptable disinfectants/sanitizers in spas. I prefer chlorine as I do not like the smell of bromine and I have a chlorine pool so it simplifies my chemicals that I keep on hand.
    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

  3. Back To Top    #3

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: hot tub question

    If you add a LOT of chlorine to a spa with bromide, then you can have a yellow/brown color from the bromine, but this should dissipate as the chlorine gets diluted (unless you added way too much). This is more likely to happen if the pH is low as well.
    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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