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

Thread: Does shocking increase Ph?

  1. Back To Top    #1

    Does shocking increase Ph?

    I'm new to the pool owners crowd. Been testing with strips until my Taylor test kit arrives. I worked on my hardness, then TA. I got those 2 in check. My current readings are:

    Total Hardness = 250
    TC = 1
    FC = .5
    Ph = 6.8
    TA = 100
    CA = 20

    I sort of shocked the pool using clorax but was hesitant to put enough in to superchlorinate so I want to superchlorinate now. Will the clorax increase my Ph? If not, then I guess I should get the Ph in range first because I read that chlrine isn't as effective with out of range Ph. I started with green water but with vacumming and such, I now have cloudy blue water. I'm reading that shocking will help eliminate this. What does everyone think my next step should be? Raise Ph then superchlorinate? How long does it take for the chlorine to come back down to acceptable levels?
    Thanks for the help.
    10000 gal round above ground pool
    Hayward cartridge filter 1.5hp

  2. Back To Top    #2

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    28,414

    Re: Does shocking increase Ph?

    Quote Originally Posted by skibender
    I'm new to the pool owners crowd. Been testing with strips until my Taylor test kit arrives. I worked on my hardness, then TA. I got those 2 in check. My current readings are:

    Total Hardness = 250
    TC = 1
    FC = .5
    Ph = 6.8
    TA = 100
    CA = 20

    I sort of shocked the pool using clorax but was hesitant to put enough in to superchlorinate so I want to superchlorinate now. Will the clorax increase my Ph? So little you won't be able to detect it

    If not, then I guess I should get the Ph in range first because I read that chlrine isn't as effective with out of range Ph. I started with green water but with vacumming and such, I now have cloudy blue water. I'm reading that shocking will help eliminate this. It sure will.

    What does everyone think my next step should be? Raise Ph then superchlorinate? That's exactly what I'd do. The chlrine is effective with that low pH but you don't want your pH down there for some other reasons. bring it up to 7.2 - 7.6 and then put you chlorine in. These steps can be done almost simultaneously...no need to wait.

    How long does it take for the chlorine to come back down to acceptable levels? Depending. If you have no CYA (you don't report any) and it's sunny and your pool still has some cloudiness, you may find the chlorine gone in 24 hours
    Thanks for the help.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Guest
    Just remember that the pH test, whether strips or liquid, will not give accurate results and WILL test high when your chlorine levels are high! DO NOT attempt to lower your pH until your chlorine levels have dropped below shock level! The pH results are not accurate because of a chemical interaction between the high chlorine level and the indicator used to test pH!

  4. Back To Top    #4
    Thanks for the help. Sounds like I'm on the right track. What exactly is CYA? My test strips report cyanuric acid. I thought this was CYA but I must be mistaken.
    10000 gal round above ground pool
    Hayward cartridge filter 1.5hp

  5. Back To Top    #5

    Join Date
    Apr 2007
    Location
    Arizona
    Posts
    924
    CYA is cyanuric acid.
    Buggs

    14,000 gallon, in ground, plaster, free form, play pool.
    Sta-Rite Max-E-Glass with a 1.5 hp Emerson motor
    WaterCo Micron High Rate sand filter S750 490 lb, 4883 sq ft - using ZeoBest
    In floor Polaris cleaning system
    Blue Diamond robot for those after storm days when I can't wait overnight for the in floor to clean it.

Posting Permissions

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