+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13

Thread: Sodium hypochlorite and PH levels

  1. #1
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Sodium hypochlorite and PH levels

    Iím putting this is the chlorine section because that is the only thing I have added to the pool since I opened it, not counting the spring opening kits from Leslies.

    My concern is really about PH. Will sodium hypochlorite raise the PH level, all other things being equal?

    I ask because the PH has risen from 7.6 to 7.8. The only other thing I know of that has entered the pool is some rain on Friday night, about a half inch according to the weather man.

    Thanks
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

  2. #2
    aylad is offline SuperMod Emeritus Vortex Adjuster aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars
    Join Date
    Dec 1969
    Location
    Northwest Lousiana
    Posts
    6,600

    Default Re: Sodium hypochlorite and PH levels

    It will cause a very temporary increase, but as the chlorine is broken down by stuff in the water, the byproducts negate the higher pH, so as an end result it shouldn't change.

    If you have any aeration (a heavy rain that bubbles at the surface, or splashing kids in the water, would do it) in the pool, or a SWCG, those are common culprits for rising pH, as well as higher pH in fill water.

    Janet
    Janet

  3. #3
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Re: Sodium hypochlorite and PH levels

    Oh yeah aeration. It had to aerate the pool during that rain Friday night.

    Thanks J.
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

  4. #4
    CarlD's Avatar
    CarlD is offline Super Moderator Vortex Adjuster CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
    Join Date
    Dec 1969
    Location
    North Central NJ
    Posts
    8,750

    Default Re: Sodium hypochlorite and PH levels

    That's it. Just that simple. Bleach/LC is effectively pH neutral. The ONLY thing it adds is a little bit of salt, but 10 years of using bleach won't even begin to put enough salt in the water for a salt water chlorine generator to operate.

    Carl
    Carl

    16'x40' rectangle 19K gal AG vinyl pool; ; Hayward T210 sand filter and 2 Speed Superpump 1hp pump; Solar heated. Test kit: PS 233; PF:6.3

  5. #5
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Re: Sodium hypochlorite and PH levels

    Quote Originally Posted by CarlD View Post
    That's it. Just that simple. Bleach/LC is effectively pH neutral. The ONLY thing it adds is a little bit of salt, but 10 years of using bleach won't even begin to put enough salt in the water for a salt water chlorine generator to operate.

    Carl
    Thanks Carl.
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

  6. #6
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Re: Sodium hypochlorite and PH levels

    Okay I’m starting to freak out a little. Aeration raises pH. That must have something to do with oxygen. If the pH keeps going up, at what level do I act to bring it down? What’s the tipping point?
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

  7. #7
    Watermom's Avatar
    Watermom is offline Super Moderator Quark Inspector Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars
    Join Date
    Dec 1969
    Location
    Charleston, WV
    Posts
    11,646

  8. #8
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Re: Sodium hypochlorite and PH levels

    Thank you.
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

  9. #9
    aylad is offline SuperMod Emeritus Vortex Adjuster aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars
    Join Date
    Dec 1969
    Location
    Northwest Lousiana
    Posts
    6,600

    Default Re: Sodium hypochlorite and PH levels

    Many pools have a pH at which they like to "settle"--my pool wants to stay at 7.8 no matter what I do or how many splashing kids I have in it...I spent the first few years fighting it with acid to get back down to 7.4 or so, adjusting alk, etc. and finally just realized that if I left it alone, it would stay at 7.8. (My fill water is 7.8).Been there now for the last 4 or 5 years with no help from me. So....don't panic, just test every day or so to see if it stops at 7.8 or if it keeps rising. If it does,, then you can lower it with acid. If it doesn't, then you can relax and not worry about it.

    Janet

  10. #10
    Join Date
    Jun 2011
    Location
    Louisville KY
    Posts
    103

    Default Re: Sodium hypochlorite and PH levels

    I know what you mean about the pool wanting to be at certain levels. I’ve served this one for 16 years.

    But this year I’m using this new method so I have a bit of trepidation since I really don’t know what I’m doing yet.

    I’m still foggy on how Sodium hypochlorite can be pH neutral when everywhere I look on the net I see it has a pH of 9 to 13. I truly believe Carl when he says it’s neutral, but I don’t understand all this conflicting info.

    I don’t understand how aeration raises pH. It must have something to do with oxygen.

    Oh, so much water, so little time.
    Circa 1980 IG, VL, 36K Gal, DE, Chlorine

+ Reply to Thread

Similar Threads

  1. Percentage sodium hypochlorite?
    By Mindiv in forum Using Chlorine and Chlorinating Chemicals
    Replies: 4
    Last Post: 06-06-2013, 03:31 PM
  2. Confused on Bleach, Calcium Hypochlorite, and Sodium Dichloroisocyanurate
    By TXREALTOR in forum Using Chlorine and Chlorinating Chemicals
    Replies: 2
    Last Post: 08-22-2012, 12:26 PM
  3. 6% sodium hypochlorite vs. 68% calcium hypochlorite for start up?
    By Mtheuck in forum Pool Startup, Shutdown, & Winter Operation
    Replies: 4
    Last Post: 04-07-2012, 09:44 PM
  4. Compare Calcium and Sodium Hypochlorite
    By jereece in forum Using Chlorine and Chlorinating Chemicals
    Replies: 10
    Last Post: 06-27-2006, 12:51 PM
  5. BBB method With Sodium Hypochlorite???
    By mikeydiker in forum Using Chlorine and Chlorinating Chemicals
    Replies: 3
    Last Post: 06-19-2006, 03:28 PM

Bookmarks

Posting Permissions

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