Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Help with pH and TA

  1. Back To Top    #1

    Join Date
    Apr 2013
    Location
    Akron, NY
    Posts
    40

    Help with pH and TA

    Working on converting a friend at work to BBB from shock and trichlor pucks. He brought me a sample of his water to test with my TF kit. Amazingly, his CYA was only around 50. But here is my question, when I test for pH, the color is so off the chart low it looks like it is almost non-existant. Then when I do the TA test, after I add the 5 drops of the 2nd solution where the water is supposed to turn green, it immediatly goes pink! So based on those results, should we attack the low pH or alkalinity first?
    His pool is 13500 gallons. I am thinking of attacking TA first. The pool calculator says 20lbs of baking soda takes it from 0 to 100 - so I was going to recommend 10 lbs to start and then check the results. Can we try to raise the pH at the same time?
    24 foot 54 inch AGP, 14.5k gallons, 1hp pump, 120 sq foot cartridge filter

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Help with pH and TA

    Those results suggest that the PH is around 4.5 and TA is zero. The best solution is to raise PH with borax. By the time you get the PH into range the TA should be fine. If you raise TA first the TA increase from raising PH will drive TA way too high.

    Keep in mind that the Pool Calculator is not very precise for huge PH changes. So use much less than you think you need and do the PH increase in several steps, testing PH after each dose mixes in to see if you have gotten into range yet.
    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

    Join Date
    Apr 2013
    Location
    Akron, NY
    Posts
    40

    Re: Help with pH and TA

    Thanks for clarification! Off to Walmart!
    24 foot 54 inch AGP, 14.5k gallons, 1hp pump, 120 sq foot cartridge filter

Posting Permissions

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