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Thread: How low can I keep TA to avoid PH creep up?

  1. Back To Top    #1

    Join Date
    Aug 2012
    Location
    Montreal, Canada
    Posts
    18

    How low can I keep TA to avoid PH creep up?

    I use a Stenner pump with 10% pool liquid chlorine to keep the chlorine around 1ppm.
    I also have an ozonator which injects some air bubbles into the water stream along with the ozone.

    I figure this is the reason why my PH is always high (the constant aeration). I've been fighting to keep it away from 7.8+. I've been trying to lower the PH but it also lowers my TA. In an effort to stabilize it all in the lower part of the 7.2-7.8 range, I have lowered the PH to 7.0 a few days ago by adding muriatic acid and now, the PH is already back up to 7.4 and my TA is only 50 in a fibreglass pool.

    Should I add baking soda to increase the TA (and also the PH) or can I live with a TA around 50? Hopefully my PH won't be back up to 7.8 with a TA that low?

    Thanks,
    Daniel
    40000L ingound fiberglass pool
    Ozonator + liquid chlorine injection using Stenner pump
    LP gas heater, Hayward 220v pump & sand filter running 24/7
    TF-100, Lamotte ColorQ Pro7

  2. Back To Top    #2

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: How low can I keep TA to avoid PH creep up?

    50 is kinda low, but you could manage it. Anything less than that might cause wild pH swings and should probably be raised. See what sitting at 50 does for you. You could also add borates to your pool. Borates act as a secondary buffer system and can be very helpful in situations like yours where pH and TA are a constant battle.

  3. Back To Top    #3

    Join Date
    Aug 2012
    Location
    Montreal, Canada
    Posts
    18

    Re: How low can I keep TA to avoid PH creep up?

    Good idea, I'll see what TA=50 does to the PH and if it's not good, I'll go have a try with the BBB method... (don't have a dog or cat and only the neighbourhood cats and squirrels come drink from it. I'm fine with them not coming anymore if they don't like it!)
    40000L ingound fiberglass pool
    Ozonator + liquid chlorine injection using Stenner pump
    LP gas heater, Hayward 220v pump & sand filter running 24/7
    TF-100, Lamotte ColorQ Pro7

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