Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Is that the right amount of Borax?

  1. Back To Top    #1

    Is that the right amount of Borax?

    Hi gang,

    I did a fresh fill for my spa and I'm using the BBB method (first time).

    So far, so good. However I do have a question about the use of Borax. I am assuming that on a fresh fill, the level is "0". I also have no way of testing the Borate level with my test kit. So, according to the pool calculator, I need to add 551 grams of Borax, followed by PH down (dry acid) in the amount of 352 grams. I've searched for measurement specs for Borax relative to grams per cup. I found one answer on the web that indicated 1 cup of Borax = 204 grams. That would mean I would require 2.7 cups of Borax to attain 50ppm for my 1,250 liter spa. Would that be correct? It just sounds like a lot of Borax.

    Thanks

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  2. Back To Top    #2

    Join Date
    Jun 2009
    Location
    Vero Beach, FL
    Posts
    462

    Re: Is that the right amount of Borax?

    If you switch the units in the pool calculator to English up at the top, it then tells you how many oz by weigh and volume. Hover the mouse pointer over the oz reading and just below it will show it converted into lbs and cups respectively.
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

  3. Back To Top    #3

    Re: Is that the right amount of Borax?

    Quote Originally Posted by lborne
    If you switch the units in the pool calculator to English up at the top, it then tells you how many oz by weigh and volume. Hover the mouse pointer over the oz reading and just below it will show it converted into lbs and cups respectively.
    Thanks for the tip on how to get the cups, etc information lborne.

    I went ahead and added a 2 cups of Borax and also the appropriate amount of pH down to compensate.

    My initial concern was the total amount of Borax required. The spa store supplied chemical such as SpaGuard Optimizer Plus calls for a lot less. However, I do understand that it is different than Borax. Just making sure I'm not reading things incorrectly.

    Regardless, the Borax has been added and I will be checking my pH and TA tomorrow to see what impact the Borax has on those readings.

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  4. Back To Top    #4

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Is that the right amount of Borax?

    I used 2 cups borax in my spa, hit 50ppm according to the borate test strips. You should be fine.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  5. Back To Top    #5

    Re: Is that the right amount of Borax?

    Quote Originally Posted by PaulR
    I used 2 cups borax in my spa, hit 50ppm according to the borate test strips. You should be fine.
    --paulr
    Thanks Paul
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

Posting Permissions

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