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Thread: Can't keep BR levels up in spa

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    Join Date
    Apr 2016
    Location
    College Station, TX
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    79

    Can't keep BR levels up in spa

    Two part question:
    Background- 220gal jacuzzi, 2 speed, cartridge filter, filled in March with city water, TA and pH balanced to 70 TA and pH stable around 7.5 when aeriating. It is a tub we were given which I replaced the pump and some plumbing but never did an ahhh-some treatment to. I added sodium bromide according to the bottle to 30 ppm. I am keeping a spreadsheet with my daily tests and chemical additions but I had some misunderstandings in the beginning before reading enough and at one point I think I over-chlorinated with bleach to somewhere in the 25 ppm cl area and may have burned through all of my sodium bromide.

    I have been testing with OTO because I do not know how to interpret the FAS-DPD test from my K-2006C kit. I've seen some conflicting information here, but it seems the OTO is regarded as a safe test. So here are my two questions:

    1. I want to buy some R-0872 so I can test specifically BR. The other parts I need are in my K-2006C kit, I think. Is there a date stamp on these products I can check to make sure I'm not buying something several years old?

    2. The chlorine/bromine level situation has me scratching my head. I am vigorously adding chlorine 10% bleach at 100mL at a time to try and get the levels up and cannot seem to get them above 2 ppm on the OTO test. Pool math indicates 25mL should raise the level 4 ppm. The tub was stable at 5 ppm for a while before I decided to add the sodium bromide and was stable for a few days of treatment after the sodium bromide. It acted like I would have predicted. But something has happened that is keeping the levels low.

    I'm afraid I have confused the situation so much I may have to drain it and start over. I hate to have to redo to borax and TA treatments, but at least it is small so it won't take much.

    The spreadsheet is really wide and wouldn't be easily viewable here but I will try and post the file. It is a google doc.

    Google Sheets - create and edit spreadsheets online, for free.

    I've been gone for a week and getting tests and chemicals added by my wife so I haven't filled in the results from the last week yet.
    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

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    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
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    Re: Can't keep BR levels up in spa

    hey there, ok, you are mixing things I think literally, you need to pick what system you want

    Chlorine: How do I use Chlorine in my Spa (or pool)?)


    Bromine: How do I use Bromine in my spa (or pool)?)

    Now I went from bromine, to chlorine, now I am using a SWG for chlorine... I did get some strange reading during the transition and I just pushed through them.. I did a SLAM for my hot tub and kept it there until all testing was normal, then let it drift down and checked all tests and adjusted from there...

    I hope this helps
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    College Station, TX
    Posts
    79

    Re: Can't keep BR levels up in spa

    I thought I had chosen using bromine and bleach as an oxidizer. Now you have me second guessing myself!


    Intex 16'x32'x54" 17Kgal AGP since 2014. Sand filter, Hayward skimmer, home built 10'x15' deck and stairs, solar heater. High TA tap water, moderate rainfall, weekly use. Treated with 10% bleach, MA and some dichlor initially. Soon to add borates.
    Taylor K2006C
    Future projects - automatic chlorine pump, online pool sensors, better heater, IGP (maybe)

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    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
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    Re: Can't keep BR levels up in spa

    No problem

    Most of the time you use MPS with bromine but it can be done many ways, I just went straight chlorine because it was way easier and worked better than bromine ever did...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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