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Thread: Getting close to balance?

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    Johnmarkpainter's Avatar
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    Apr 2016
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    Hendersonville, TN
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    Getting close to balance?

    PH 7.2
    FC 6 (should be 5)
    TA 60
    CYA 70
    CH 400
    Salt 3600
    Borates 40-ish
    CSI -0.76

    SO...
    12 boxes of 20 Mule Power and 4 gallons of MA got my TA down to 60 and my Borates somewhere just below 50 (test strips).
    With the SWG, I should keep my TA from getting LOWER than 60 right?
    I am thinking that if I still need more Borates (letting it mix and see what it is next week), that will likely raise my TA some.

    Still slightly low on the CYA but I need to vacuum the pool and backwash before adding anything else.
    Does this all make sense?
    I am looking forward to just doing the Basic tests for a while
    28,000 Gallon, IG, Vinyl, SWG, Sand Filter
    Goldline Aqua Rite SWG
    Hayward Pro Series Sand Filter
    Flotec Pump
    Hayward Turbulent Flo Chamber

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    JoyfulNoise's Avatar
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    May 2015
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    Tucson, AZ
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    11,599

    Re: Getting close to balance?

    I would not add anything else to your pool but I would definitely get your pH up to 7.6 (aeration if you can) because your CSI is really negative. While it is true that low CSI does not matter for a vinyl pool, I'd still try to stick to the recommended levels and try to get the CSI higher than -0.3.

    The SWG is unaffected by TA per se. Rather, it is the combination of pool water parameters vis-a-vis the CSI that matters. For an SWG, a slightly negative CSI (~ -0.1) is preferred to keep calcium scaling inside the cell to a minimum. With the borates you have added to your water, your cell will be well protected against pH rise inside the cell.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Johnmarkpainter's Avatar
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    Apr 2016
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    Hendersonville, TN
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    Re: Getting close to balance?

    Messing with Poolcalc, If I get my PH up to 7.5 the CSI will go up to -0.53
    We are getting a lot of rain this week (as in I drained off 4" yesterday and it is already a few inches high again) I'm going to check PH again to see it went back up on it's own at the end of the day.
    It's going to be too cold for swimming until the weekend so my "Aerators" are not going to be in there
    28,000 Gallon, IG, Vinyl, SWG, Sand Filter
    Goldline Aqua Rite SWG
    Hayward Pro Series Sand Filter
    Flotec Pump
    Hayward Turbulent Flo Chamber

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