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

Thread: ques's on TA, Acids and pH

  1. Back To Top    #1

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    1,304

    ques's on TA, Acids and pH

    Hello to all,

    In another thread, I was posting my most recent [today-3/18] pool readings.

    Although my CSI is -.25, I noticed that to get it to a more neutral number of "0", I would have to raise my TA from 70 to 100-120, and or lower my pH from 7.5 to 7.8. However, when I have the pool in a near [winter] equilibrium btw not having to add any MA for weeks, that a great thing, However, it means that my TA is usually 50-55 and this usually puts my CSI in the higher (-) range ie, -35+.

    My TF-100 kit states "the good range" for a CL based pool is a TA of 100-120. However, that would mean adding tons of MA to keep my pH down, thus I would be fighting the game of keeping my pH & TA in equilibrium. Is there anything else I can do to raise my TA and keep my pH in a 7.5-7.8 range w out adding tons of MA and keep a higher TA level, maybe in the 85-95 range? Also, I know the dynamics of Winter Chemical Maintenance [WCM] is much diff than SCM w way diff temps, CYA needs for FC optimization and other.

    I would appreciate your help on this. Thank you very much and pls let me know if you have any questions?

    Regards, tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: ques's on TA, Acids and pH

    We have revised TA recommendations downward. More here, Pool School - Recommended Levels

    CSI anywhere from -0.3 to 0 in a saltwater pool is perfect. A little less in winter is fine, up to -0.6. In a non-saltwater pool anything from -0.3 to +0.3 is perfect and -0.6 to +0.6 is fine.

    TA in a saltwater pool is usually good 50 to 60. Non saltwater is good 60 to 80.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    1,304

    Re: ques's on TA, Acids and pH

    Thanks p-dv....I guess I'm right there in the sweet spot w -.25 and TA = 70.

    Since you're from the DFW area, what are your pool temp's up there? [providing you are not either heating your pool or running your spa a lot that empties into your pool].

    I'm still wrestling w the TA, acid, ph topic, and will be more so when it really starts to heat-up. It would be great to not have to add acid but every 3-4 weeks, thus keeping TA as high as possible, a better CSI and not having to add sodium bicarbonate as often...

    THanks again,
    tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: ques's on TA, Acids and pH

    I am heating the pool so we were at 83 yesterday afternoon. Generally, a pool will be at the midpoint between lo and hi temp. So, lo of 60 and hi of 80 will give a pool temp around 70.

    TA will push PH up until it doesn't anymore. It will stop at some point. Lowering TA by 10ish until your pH stays at 7.8 is usually the best scenario for most folks in the south-southwest. Most people's pools will do fine with TA as low as 50. You know TA is too low when your pH becomes erratic, jumping up or down with minor inputs. 40 is most commonly too low for most folks.

    Yes, you are in a good place right now with -0.25 CSI and TA at 70. All I would do now is lower ph to 7.6 when it gets to 8.0. This will slowly lower your TA which will slowly slow down your pH rise until TA and pH become fairly stable.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  5. Back To Top    #5

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    1,304

    Re: ques's on TA, Acids and pH

    Thanks p-dv...done.

    Yes, from the orig documentation I read, TFP has lowered the overall TA's... I like the "lower the pH to 7.6 when it gets to 8...I usually lower pH to 7.5 when it gets to 7.8...rarely do I let it go to 8. Since my plaster is cured and I am no longer in the "keeping the acidity lower per installers", I'll let that pH get a bit higher before sending her down again to the mid 7's...I will then document the frequencies of adding MA and see if they become less and less over time, which I am projecting they should. Once the pH becomes erratic, I'll then do the NaHCO3 addition to raise TA again...

    Again, appreciate your follow-up and good luck,
    tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

  6. Back To Top    #6
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: ques's on TA, Acids and pH

    Yes, oops! I fixed my comment.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  7. Back To Top    #7

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    1,304

    Re: ques's on TA, Acids and pH

    Quote Originally Posted by pooldv View Post
    Yes, oops! I fixed my comment.
    LOL - so did I now - deleted the quote - folks are going to have to do some real figuring now...
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward H400FD 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill If you enjoyed your TFP experience, please consider donating to Support TFP!

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: ques's on TA, Acids and pH

    Ha! Good, keep everyone on their toes!
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

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