Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Order of Operations

  1. Back To Top    #1

    Join Date
    Mar 2012
    Location
    Richmond, VA
    Posts
    24

    Order of Operations

    I opened up the pool last weekend and have it cleaned up from deep green to perfectly clear. I checked chems this afternoon and have the following:
    FC = 0
    PH = 8.2
    TA = 40
    Salt = 3200
    CYA = 0
    Borate = 15
    Salt is good and turned on the salt generator to supply FC. I added 4 lbs of stabilzer and will pick up 8 more lbs to correct.
    My question is should I adjust the PH first or TA? They seem to contradict each other.
    I will adjust borate after everything else is correct.
    Any suggestions or course of action?
    Thanks in advance,
    Jim
    Richmond, VA
    36,000 Gal/20'x40' Vinyl Diving Pool - Inground/Hayward Tri-Star Dual Speed 1.5 HP Pump/Hayward T-15 Salt Cell/Goldline Controller/Sand Filter/Borates

  2. Back To Top    #2

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,995

    Re: Order of Operations

    HI Jim,

    You'll want to correct your PH and then monitor TA. Your TA is a buffer for your PH. Normally you don't need to chase a particular TA number unless your PH isn't staying stable.......which it generally won't if TA is too out of whack.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,964

    Re: Order of Operations

    Aimee is correct about the actions of pH and TA but I would suggest you raise the TA first......up to about 80-90 ppm.

    Secondly, bring your pH down to around 7.5. This will cause your TA to fall as well but not dangerously low since you had raised it previously.

    You didn't ask but I would get CYA in the pool right away and I would dose your pool with liquid chlorine up to about 5 ppm to get it started.......saving cell life on the swg.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Mar 2012
    Location
    Richmond, VA
    Posts
    24

    Re: Order of Operations

    Thanks AimeeH and Duraleigh. I put the last of my acid in last night and have to make a chem run. Will check again this AM and adjust TA followed by PH.
    I did add some CYA and will add the remaining today.
    Thanks again for the help!
    Richmond, VA
    36,000 Gal/20'x40' Vinyl Diving Pool - Inground/Hayward Tri-Star Dual Speed 1.5 HP Pump/Hayward T-15 Salt Cell/Goldline Controller/Sand Filter/Borates

  5. Back To Top    #5

    Join Date
    Mar 2012
    Location
    Richmond, VA
    Posts
    24

    Re: Order of Operations

    After thinking about it, it makes sense to correct the TA first since it is a buffer for the PH. This seems similar to the CYA/FC relationship. The CYA "protects" the FC and the TA protects the PH?
    Is this correct?
    Thanks,
    Jim
    Richmond, VA
    36,000 Gal/20'x40' Vinyl Diving Pool - Inground/Hayward Tri-Star Dual Speed 1.5 HP Pump/Hayward T-15 Salt Cell/Goldline Controller/Sand Filter/Borates

  6. Back To Top    #6

    TFP Guide

    Jezza's Avatar
    Join Date
    Jan 2015
    Location
    Bunbury, WA, Australia
    Posts
    948

    Re: Order of Operations

    Yes you are sort of right -TA buffers and stabilises your pH levels.

    The balancing act is to get your TA to a point (around 50-90 mark usually) which stabilises the pH rise and hence the need to add acid as much. However going below this mark usually crashes the pH which is obviously a highly undesirable result as it threatens the integrity of your equipment and pool.
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,
    K-2006

Posting Permissions

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