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Thread: Testing Question Br VS Cl

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    Testing Question Br VS Cl

    I have a Taylor 2106 Bromine kit. I have been under the impression that if I run the Bromine test as usual, I can take the final results and dived them by 2.2 to get an accurate CL reading. Can anyone confirm this? I want to be sure I am on track with this. Example would be if I used my kit to test as if Bromine, and got 10 PPM, this would be 4.5 ppm CL. Is this right?

    Also, if CL is at 15 ppm after a shock, can I use the tub or is this too much to soak in? THX
    Barrier Reef Pacific1-Pacific color 37'9" X 14'1" fiberglass IG ~ 17,500 gallons, FHPM1.0-2 Jandy FloPro pump, Jandy Aquapure 1400 SWG, Waterco Multicyclone 16 pre filter, Jandy CV580 filter, 3 PAL-2000 RU LED lights, 1 skimmer, 2 main drains, 3 returns, 2" rigid pvc suction and return plumbing, BBB method, TF100 Kit

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    Join Date
    Mar 2007
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    Re: Testing Question Br VS Cl

    Yes, you divide your result by 2.25 (though most people just divide by 2 since that's generally close enough). I don't think you'll enjoy soaking with that high a chlorine level and assuming your CYA level is around 30 ppm or so, 15 ppm FC is too high for soaking. If the spa is maintained consistently with sufficient oxidizer after a soak, then there should be no need to shock the spa and you can start your next soak with a low chlorine level (1-2 ppm) so that you won't notice the chlorine during your soak. Why did you think you needed to shock the spa?
    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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    Re: Testing Question Br VS Cl

    Chem Geek, I shocked it because I thought I may have had White Mold prior to realizing my PH was way high and causing Calcium Scale. My Technichlor was doing a great job of maintaining a 2-4 ppm, I hope to get it back to that operation now that I have the other issues figured out. How can I get the CL to drop faster? It has only dropped from 19 to 15 in 24 hrs.
    Barrier Reef Pacific1-Pacific color 37'9" X 14'1" fiberglass IG ~ 17,500 gallons, FHPM1.0-2 Jandy FloPro pump, Jandy Aquapure 1400 SWG, Waterco Multicyclone 16 pre filter, Jandy CV580 filter, 3 PAL-2000 RU LED lights, 1 skimmer, 2 main drains, 3 returns, 2" rigid pvc suction and return plumbing, BBB method, TF100 Kit

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    Join Date
    Mar 2007
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    Posts
    12,082

    Re: Testing Question Br VS Cl

    You can use a reducing agent. For a spa, the easiest one to use is 3% hydrogen peroxide you can get at a drug store. Roughly the same volume of 3% hydrogen peroxide neutralizes the equivalent volume of 6% bleach. So 10 ppm FC in 350 gallons that would take 7.3 fluid ounces of 6% bleach would take 7.3 fluid ounces of 3% hydrogen peroxide to neutralize it.
    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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