Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Need to lower pH?

  1. Back To Top    #1

    Join Date
    May 2013
    South Florida

    Need to lower pH?

    15K gallon pool

    My levels:
    FC 5.5
    TA 70
    CH 250
    pH 7.8

    So, I guess I need to lower the pH huh? Maybe add 1 cup of muriatic acid (31.65%)? I added two cups yesterday. My pH was at 8.0 and dropped to probably 7.6, but now it's at 7.8. (I should mention I have problems with the pH color chart...they're all so close).

    I couldn't test CYA because the sun isn't out. I find it difficult to do that dot test.
    15K gal, IG plaster, screened, Marathon Electric 1 HP single speed pump, Hayward c-900 cartridge, Hayward SwimPure 40K SWG

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Need to lower pH?

    Unless you've been using pucks or powder to chlorinate, draining or backwashing, CYA should stay pretty much the same week-to-week.

    Let do the math for you. It will tell you how many ounces of acid to add. Target 7.4 and be done with it.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with 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