Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Big CYA problem, minor pH and TA issues

  1. Back To Top    #1
    langerking's Avatar
    Join Date
    Jul 2013
    Location
    Clermont, Florida (that's near Disney World)
    Posts
    104

    Big CYA problem, minor pH and TA issues

    Thanks to my extensive use of chlorine pucks from before my enlightenment, my CYA is 160. I have been slowly getting it down, it was probably in the 250-275 range. I had very low pH and TA also and got that corrected, in the meantime my pH has risen beyond my target (it's 8.0 now and TA is also a bit high (110). So my question is, do I put in some muriatic acid now (lower pH to 7-0 - 7.2 and aerate to raise the pH) or, just continue to drain and refill to get my CYA into the 30-50 range? In other words, there is still so much water replacing to be done, does it make sense to spend any energy on the alkaline issues at this point?
    1) 21,000 gallons
    2) DE
    3) IG (in ground)
    4) Vinyl
    5) Hayward 1.5 hp DE 3600 72 GPM

    Taylor K-2006
    STA-RITE Great White GW9500

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Big CYA problem, minor pH and TA issues

    There is no reason to worry about the TA, but you should certainly keep the pH in the 7s to avoid any problems like scaling.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Big CYA problem, minor pH and TA issues

    If you're actively draining and refilling I would wait till I got done with that to start adjusting much. I wouldn't let it stay high for more than a week, but a few days isn't going to hurt anything as long as your CH isn't very high. If the CH is high and you're concerned with scaling go ahead and knock the pH down now.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4
    langerking's Avatar
    Join Date
    Jul 2013
    Location
    Clermont, Florida (that's near Disney World)
    Posts
    104

    Re: Big CYA problem, minor pH and TA issues

    My CH is 120 and it's a vinyl pool, so I should be ok with scaling. Maybe I'll just put in a pint of acid for now.
    1) 21,000 gallons
    2) DE
    3) IG (in ground)
    4) Vinyl
    5) Hayward 1.5 hp DE 3600 72 GPM

    Taylor K-2006
    STA-RITE Great White GW9500

  5. Back To Top    #5
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Big CYA problem, minor pH and TA issues

    With a CH of 120 I wouldn't worry about it. Just keep draining and refilling. However, acid is cheap and it only takes a minute to dump a little in.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6
    msgtdan's Avatar
    Join Date
    Jul 2011
    Location
    SW MO
    Posts
    653

    Re: Big CYA problem, minor pH and TA issues

    Check the PH of your fill water, if it's high changing water will just keep increasing it so you'll have to adjust. If low changing water will bring it down.
    Dan D
    Used 2003 Aqua Leader 27'x52", 17,800 w/10" hopper, SwimPro SW256T 250# sand filter, Hayward PowerFlo LX pump 1hp impellor, Emerson 1 1/2 hp motor, setup Aug 2012 Summer 2011 used Summer Escapes Ring pool 14' x 42", Intex 1600gph sand filter, HTH 6 way test kitTF-100 w/stirrer, Well water @ FC=0, PH=7.2, TA=290, CH=320

  7. Back To Top    #7
    langerking's Avatar
    Join Date
    Jul 2013
    Location
    Clermont, Florida (that's near Disney World)
    Posts
    104

    Re: Big CYA problem, minor pH and TA issues

    Quote Originally Posted by msgtdan
    Check the PH of your fill water, if it's high changing water will just keep increasing it so you'll have to adjust. If low changing water will bring it down.
    Fill water is 7.2, so it might lower the pH. Funny thing is I have drained the pool down a total of 3 ft already and it hasn't brought my pH down. Is this telling me that the pH is actually rising faster? Another factor could be that when I drain the pool, one of my return lines (over the stairs) is exposed by several inches and there is definitely some aeration going on.
    1) 21,000 gallons
    2) DE
    3) IG (in ground)
    4) Vinyl
    5) Hayward 1.5 hp DE 3600 72 GPM

    Taylor K-2006
    STA-RITE Great White GW9500

  8. Back To Top    #8
    langerking's Avatar
    Join Date
    Jul 2013
    Location
    Clermont, Florida (that's near Disney World)
    Posts
    104

    Re: Big CYA problem, minor pH and TA issues

    Quote Originally Posted by langerking
    Quote Originally Posted by msgtdan
    Check the PH of your fill water, if it's high changing water will just keep increasing it so you'll have to adjust. If low changing water will bring it down.
    Fill water is 7.2, so it might lower the pH. Funny thing is I have drained the pool down a total of 3 ft already and it hasn't brought my pH down. Is this telling me that the pH is actually rising faster? Another factor could be that when I drain the pool, one of my return lines (over the stairs) is exposed by several inches and there is definitely some aeration going on.
    I have made sure not to aerate during the refill and have gotten some slight drops in the pH and TA. Doing another 13 inch refill today. I am afraid to take my water much lower than that in my vinyl pool.
    1) 21,000 gallons
    2) DE
    3) IG (in ground)
    4) Vinyl
    5) Hayward 1.5 hp DE 3600 72 GPM

    Taylor K-2006
    STA-RITE Great White GW9500

Posting Permissions

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