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Thread: To change my ph or not ?

  1. Back To Top    #1

    Join Date
    Jan 2008
    Location
    Dallas TX
    Posts
    20

    To change my ph or not ?

    Hello,
    My PH recently went from 7.6 to 7.8 (in the last week).
    My Alkalinity went from 90 to 80.
    CYA is 40, CHA 330
    FC = 0.5, CC=0

    Should I add some muriatic acid to take down the ph to 7.6, or should I leave it and worry about it in the summer ?
    I live in TX and my pool runs 365 days a year, it is not heated so we swim in it only in the summer.

    Thanks
    ******************************************
    My pools info:
    IG concrete pool, 15000G, DE, iRobot Verro, Located in DFW area.
    ******************************************

  2. Back To Top    #2

    Join Date
    Mar 2007
    Location
    Coastalish 'down easter'
    Posts
    4,160
    Hi, my first thought is that you may have a SWCG or something to cause airation, but the sudden rise in pH and subsequent lowering of alk is a bit puzzling (who am I kidding, a slow rise in pH and drop in alk is puzzling to me :P )

    I don't believe you have any saturation problems and will say to let it be for now, however DO keep an eye on the pH and alk and report back if you get any more ~ large shifts.

    Summer is approaching more quickly than we realize, perhaps you won't need to do much to the pool before the temps are swimmable
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  3. Back To Top    #3

    Join Date
    Jan 2008
    Location
    Dallas TX
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    20
    Quote Originally Posted by waste
    Hi, my first thought is that you may have a SWCG or something to cause airation, but the sudden rise in pH and subsequent lowering of alk is a bit puzzling (who am I kidding, a slow rise in pH and drop in alk is puzzling to me :P )

    I don't believe you have any saturation problems and will say to let it be for now, however DO keep an eye on the pH and alk and report back if you get any more ~ large shifts.

    Summer is approaching more quickly than we realize, perhaps you won't need to do much to the pool before the temps are swimmable
    Thanks for the tip.
    I will keep you updated.
    Another quick question: Should I add some more chlorine? If so then how much ?
    ******************************************
    My pools info:
    IG concrete pool, 15000G, DE, iRobot Verro, Located in DFW area.
    ******************************************

  4. Back To Top    #4

    Join Date
    Mar 2007
    Location
    Coastalish 'down easter'
    Posts
    4,160
    As long as you maintain the .5fc and have no cc, I wouldn't worry about adding more cl. Again, keep track of your chemistry and (it being winter) only add what you need to to keep the pool clean and ready to swim in when the weather and water allow

    Here's waiting for that day that you can swim again
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879
    The test for TA is +-10, so the level might have stayed the same rather than gone down. It is mysterious even so, rising PH should have increased the TA just a little.

    I would double check the PH the next day and if it is still high bring it back down a little.

    If the water temperature is below 50 degrees I wouldn't worry about chlorine too much, but if it is above 50 degrees I would add chlorine to a FC of 2.
    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

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