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Thread: First test of year, what to adjust first

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    First test of year, what to adjust first

    Warm winter in Ohio, scheduled to open pool end of March by PB, but plan to do myself. I've read the pool opening sticky, but it didn't answer all I needed. I reached under my cover and grabbed a water sample to test, but only reached the top of water, which has risen since end of November from below returns to lower third of skimmer. I will probably open myself in 2 weeks, and want to have a plan ready. I didn't check water temp but it's between 40-45 at most. Closed by PB since this was first year closing and I didn't feel confident clearing pipes myself. I assume the 5000 gallons or so rain and snow have changed my pH and TA so much, they were 7.6 and 60-70 at closing.

    FC 0
    CC 0
    TA 10
    CYA about 30-40
    pH well less than 6.8 by guess based on color
    CH about 200
    Salt about 2200b

    Water is very clear. I'll add bleach for chlorine until warm enough for SWG. Mostly I'm wondering about TA and pH adjustment. I'll add CYA to target 70 when I start up SWG in April. Pool won't be used until mid to late May.

    Pool Math changes a lot with pH and TA changes. Do I add soda ash per pool math first, or add the 15+ pounds Bakng Soda and then soda ash? The amount of soda ash is a lot different if starting with TA 10 than if I add baking soda for TA 60 then add what it says for pH. pH seems below 6.8, so I'm starting there and bringing pH to 7.5 and rechecking. Should I do that and then add half of baking soda, recheck, finish the baking soda, then readjust pH? I plan to deal with CH after all that then check my salt and bring up to my target around 3400. I'll add conditioner a week before SWG comes to life. Just a little confused here. Thanks in advance.

    john
    26,000g IG, Fiberglass side/Concrete bottom, epoxy paint, Pentair IC40 SWG, Pentair Cartridge Filter 420, Pentair Intelliflow 3 HP VS pump, Pentair 120 Heat Pump, pool installed 11/2015, painted and equipment installed 4/2016. City Water.

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    AimeeH's Avatar
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    Re: First test of year, what to adjust first

    I would make adjustments to Get PH in range and THEN address any TA issues.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: First test of year, what to adjust first

    Aimee's right. You can do it either one first (I sorta' like bringing TA up to around 60 first) but get your pH up to around 7.4 and TA to 60 or more right away.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    AimeeH's Avatar
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    Re: First test of year, what to adjust first

    My TA is very low upon opening every year with PH not way out of whack but a tad low. I do address TA first and let my SWG take care of PH adjustments naturally. But, OP has extremely low PH which is why my suggestion of adjusting PH first, knowing that those adjustments will effect TA. Whereas adjusting TA with.....let's say baking soda....will adjust TA with a much less affect on PH..

    So there was my logic for what it's worth
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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