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Thread: baking soda vs washing soda

  1. Back To Top    #1

    Join Date
    May 2011
    Western IL

    baking soda vs washing soda

    The Pool Calculator recommends a value to add to raise PH using washing soda (sodium carbonate) I have a very large bag of sodium bicorbonate (baking soda) left over from the previous owner and am wondering about using that. It's my understanding that sodium carbonate is more caustic than sodium bicorbonate. So is there some way I can convert the figure for sodium carbonate into sodium bicarbonate untill the quantity I have is gone? Thanks
    44 x 20
    33,700 ga
    Hayward 1HP pump
    Hayward inline clorinator
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  2. Back To Top    #2
    dmanb2b's Avatar
    Join Date
    Apr 2009

    Re: baking soda vs washing soda

    Using baking soda to raise PH will cause your TA to increase too much. Baking soda Primarily increases TA, while washing soda impacts both TA and PH.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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  3. Back To Top    #3

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: baking soda vs washing soda

    You could also use 20 Mule Team Borax to raise pH and The Pool Calculator will also tell you how much to use. Finally, if the pH is low and you don't want to raise the TA at all, you can aerate the water to raise the pH with no change in TA.
    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"

  4. Back To Top    #4

    Re: baking soda vs washing soda

    If your pH is consistently low, then you might need to raise the TA. I see that you list an in-line chlorinator. When using trichlor, you need a higher TA than when using bleach or a SWG.

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