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Thread: Using Arm and Hammer Super Washing Soda to raise pH

  1. Back To Top    #1

    Join Date
    Jun 2015
    Gaithersburg, MD.

    Using Arm and Hammer Super Washing Soda to raise pH

    I buy bags of A and H baking soda (sodium bicarbonate) at Costco as needed to control alkalinity. The bags are big, cheap and go to great length to extol the virtues of their product for controlling pH and alkalinity in pools. From time to time I've had to buy soda ash at pool stores or home centers to raise pH knowing I was just buying expensive sodium carbonate under some name like PH UP. Anyway, I noticed that WalMart sells A and H Super Washing Soda which says "Ingredients: Sodium Carbonate." Period. "Pure and Natural since 1874. 100% Fragrance and Phosphate Free". Curiously, there's no mention of using this stuff in pools like there is on the sister product. Their web site is useless, but they "welcome your comments and questions". So I call the 800 number, where, after consulting with someone else, the woman comes back and says "we don't recommend using Super Washing Soda in swimming pools". I explain the apparent contradiction that their main product gets clear instructions for how to use it in pools, but this other one, which appears to be a common pool chemical isn't recommended. She says, "well, we haven't tested it for pool usage". A pretty bogus answer.

    I think there is some marketing arrangement going on whereby they are prevented from competing with branded pool products. Has anyone used this stuff to raise ph?
    Jfg. 33,000 gal IG. Plaster. Built 1998. DE filter . 3HP Pentair VS3050 whisper flow variable speed pump. Two skimmers plus bottom drain. Located in MD suburbs of DC

  2. Back To Top    #2

    Join Date
    Aug 2013
    Arab, Alabama

    Re: Using Arm and Hammer Super Washing Soda to raise pH

    It is fine to use Washing Powder...same thing as pH up. I use Mule Team 20 (borax) to raise my pH. Sodium carbonate can react with the Calcium in your pool and cause a cloudy precipitate.
    39YO 13K gallon former SWAMP/MONEY PIT, concrete bottom/Fiberglass Walls, Ecotech VS pump, Hayward Sand Filter, Dolphin DX5 Plus, Loop-Loc safety cover and YES, I have a TFT-100 test kit!

    Shock Level and Maintain - CL/CYA Chart

  3. Back To Top    #3

    Join Date
    Jun 2014
    Roseville, CA

    Re: Using Arm and Hammer Super Washing Soda to raise pH

    It's all about the additives. If there are none, you are good to go. If it's got whiteners, your pool may glow under ultraviolet light...

    It's like asking Band-Aid if Band-Aids should be used on cuts... "We don't give medical advice". They are afraid of some lawyer out there that needs a case to file.

    We are a nation of Gulliver's tied down by the Lilliputians!
    SWG: CircuPool (5/2018) Universal 40; 3000ppm seems ideal;
    My Ideal Specs:
    FC 5; PH 7.4-7.6; TA 90; CH 350; CYA 75; = SI ~ 0.19
    14,000 gal, in ground, plaster, Cartridge filter, Borates
    TAYLOR K - 2006 Last Circupool SI30+ 4 years RIP.

  4. Back To Top    #4

    Join Date
    Sep 2013

    Re: Using Arm and Hammer Super Washing Soda to raise pH

    Washing soda is on the list of chemicals in PoolMath (down at the bottom, in the application that lets you see effects of adding each chemical to your pool).

    Not sure of the reason for A&H's corporate position on pool use of product.
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

  5. Back To Top    #5
    Agent99's Avatar
    Join Date
    Aug 2008
    San Jose, CA

    Re: Using Arm and Hammer Super Washing Soda to raise pH

    It is just Marketing...the ingredients are key.
    25k IG/Spa Figure 8, 18x36, Pebble Sheen Blue Granite, Sta-Rite S8M150 Cartridge Filter, Pentair 460805 400k BTU Heater & 011018 IntelliFlo VarSpd
    Liquidator, Fafco Solar Heat, Polaris PB460 Booster Pump w/280 cleaner, Katchaleaf Cover, TF100 Test Kit, FAKE MAIN DRAIN

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