Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: adding salt

  1. Back To Top    #1

    adding salt

    I have a bag of Morton's Fine Solar Salt. It says on the bag, "Salt, Yellow Prussiate of Soda", it also says for agricultural feed mixing, we bought it before knowing about the pool at all....can I add this to the pool or NO? I can purchase another bag of actual pool salt for 13$ or so, but thought I'd put this in if possible so it's not wasted???

    Thank you!
    SuzanneMomof3
    Southern Florida
    First time In-Ground Pool owner (plaster?)
    Not sure on size (measuring soon)
    Rectangular, 6 feet deep end
    Pool in full sun all day (lately lots of rain)
    Salt Water Generator Zodiac L3
    Hayward Filter, 1 HP pump
    Hating the automatic vacuum we currently have
    thinking about buying a Zodiac Pacer or G3
    *not sure what else to put here* :)

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: adding salt

    You don't want to add any Yellow Prussiate of Soda to the pool. It can cause staining.

    Solar salt crystals, sold for water softeners, without any additives is fine for pool use and is typically $4 to $5 for a 40 lb bag. Most commonly the kind you want comes in blue bags.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Re: adding salt

    thank you! I'll go buy the right stuff! Again, thanks!

    Suzanne
    SuzanneMomof3
    Southern Florida
    First time In-Ground Pool owner (plaster?)
    Not sure on size (measuring soon)
    Rectangular, 6 feet deep end
    Pool in full sun all day (lately lots of rain)
    Salt Water Generator Zodiac L3
    Hayward Filter, 1 HP pump
    Hating the automatic vacuum we currently have
    thinking about buying a Zodiac Pacer or G3
    *not sure what else to put here* :)

  4. Back To Top    #4

    Join Date
    Apr 2007
    Location
    Ft Lauderdale, Florida
    Posts
    1,455

    Re: adding salt

    Hate to disagree. Yellow prussiate of Soda will only cause staining if you add it an do not dissolve it, and just let it sit on your plaster finish.
    Adding it with the main drain opened and brushing it into the main drain, or if you have the time, adding it slowly into the skimmer will not cause any staining.

    We've done this for years without problems!
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

  5. Back To Top    #5
    Guest

    Re: adding salt

    Poolsean,
    Yellow Prussiate of Soda is sodium ferrocynanide, an iron salt. It can decompose in the presence of acids or sunlight and leave iron ions in the water. This can cause staining down the line, particularly with fiberglass pool.

  6. Back To Top    #6

    Join Date
    Apr 2007
    Location
    Ft Lauderdale, Florida
    Posts
    1,455

    Re: adding salt

    Waterbear, that is correct. However, if you look at the MSDS sheet, there is a very low % of iron, neglible in fact.
    Prior to "POOL SALT" and using solar salt, YPS salt was the predominant salt used with salt chlorine generators.

    Again, I've started up TONS of pools with YPS salt, without problems.
    Sean Assam - Sean@teamhorner.com
    National Accounts and Commercial Products Manager
    AquaCal Heat Pumps www.aquacal.com
    AutoPilot Salt Chlorine Generators www.autopilot.com

  7. Back To Top    #7
    Guest

    Re: adding salt

    Quote Originally Posted by Poolsean
    Waterbear, that is correct. However, if you look at the MSDS sheet, there is a very low % of iron, neglible in fact.
    Prior to "POOL SALT" and using solar salt, YPS salt was the predominant salt used with salt chlorine generators.

    Again, I've started up TONS of pools with YPS salt, without problems.
    Not at startup but staining can and will happen down the line, particularly with a fiberglass pool, which is very prone to iron staining! (I know this from experience!

  8. Back To Top    #8

    In the Industry

    Join Date
    Jul 2008
    Posts
    144

    Re: adding salt

    Poolsean, I agree with Jasonlion and waterbear. Na4Fe(CN)6•10H2O (sodium ferrocyanide decahydrate) aka yellow prussiate of soda can be a problem. It can cause iron stains. It can also combine with existing iron to create a stain called Prussian blue. People should only use non-iodized food grade or a water softener grade of salt. Since yellow prussiate of soda can easily be avoided, it should be.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •