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Thread: tests required for first use after water replacement

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    tests required for first use after water replacement

    hi all:

    I just switched my spa from Bromine to Chlorine. I drained the water, cleaned it out then refilled. I then shocked with chlorine and drained again. I then made a mistake I filled it again, and overshocked - very badly. So I decided to partially drain again - to bring the chlorine level down.

    Might not have been the best idea - but everything is good now. Chlroine and PH levels are both OK. Are there any other tests that I should do on the water before going in the spa?

    I just have a PH/Chlorine test kit - and won't be able to get water in to the store for full testing until next week. I'd like to use the spa in the mean time, if it is safe to do so

    Any insight is appreciated!
    ~1,100 L Outdoor Hot Tub

  2. Back To Top    #2

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: tests required for first use after water replacement

    Do you know if you live in a hard water area or if you used well water to fill the spa? It would be good to know the Calcium Hardness (CH) and Total Alkalinity (TA) levels so that you can avoid scaling. If you have a water report from your municipal water district, it should be able to tell you both the CH and TA levels.

    If your CH level is very low, then you might experience some foaming in the water, especially if you don't rinse your swimsuit and skin of any soap. This is just annoying and not a serious problem.

    You should get yourself a proper test kit.

    What did you use for shocking with chlorine? If you used Dichlor, then the water is probably safe to use if the chlorine level has dropped somewhat, but if you used only bleach then it will likely be too strong.
    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"

  3. Back To Top    #3

    Re: tests required for first use after water replacement

    Not well water - but not sure if our water is hard. I will try and get some further details on it. I'll also take the water for full testing on Tuesday - the wife won't let me drop the money on my own test kit

    As far as what I used to shock it - it was HTH shock it. http://www.canadiantire.ca/AST/browse/5 ... ?locale=en

    The chlorine level has more than just dropped somewhat - the initial readings were off the charts high It is now down to ~3 in my home kit.
    ~1,100 L Outdoor Hot Tub

  4. Back To Top    #4

    Re: tests required for first use after water replacement

    Quote Originally Posted by mrgreen
    Not well water - but not sure if our water is hard. I will try and get some further details on it. I'll also take the water for full testing on Tuesday - the wife won't let me drop the money on my own test kit As far as what I used to shock it - it was HTH shock it. http://www.canadiantire.ca/AST/browse/5 ... ?locale=en

    The chlorine level has more than just dropped somewhat - the initial readings were off the charts high It is now down to ~3 in my home kit.

    It is good $ well spent considering the potential cost down the road due to scale build-up on equipment ie heating elements.
    Try that angle.
    Barry
    Sundance Hot Tub 365 gal, acrylic
    (2) 2.5 hp pumps
    ozonator
    Northwest Ohio resident

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