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Thread: CYA after storm

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    CYA after storm

    I did a complete battery of tests after the 15" of rain and five drainings to keep the pool from overflowing and they are as follows:

    FC 6.5
    CC .5
    PH 7.2
    TA 50
    CH 200
    CYA 60

    I added borax and baking soda last night and will add Calcium tonight.

    My question is, should I increase my CYA or leave it and increase next spring? I am not closing the pool and I don't cover it for the winter.
    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

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    Mod Squad JVTrain's Avatar
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    Re: CYA after storm

    I would maintain as it is and see how your chlorine usage is during the fall/winter. Easy enough to bump it back up in the spring. What was your CYA at before?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Re: CYA after storm

    Quote Originally Posted by JVTrain View Post
    What was your CYA at before?
    My CYA was 80 before.
    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

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    Mod Squad tim5055's Avatar
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    Re: CYA after storm

    I agree with Joel, why mess with it. The other numbers above, were they before or after borax/baking soda?
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: CYA after storm

    Those were before any additions. I added enough borax to raise PH to 7.7 and enough baking soda to get TA to 70. I will add enough calcium this afternoon to get to 300.
    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

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    Mod Squad tim5055's Avatar
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    Re: CYA after storm

    Quote Originally Posted by otter86753 View Post
    Those were before any additions. I added enough borax to raise PH to 7.7 and enough baking soda to get TA to 70. I will add enough calcium this afternoon to get to 300.
    Does your pH tend to rise on its own? If so you may just let it slowly drift up.

    As long as your numbers are in range, don't get too fussy for a specific magic number.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: CYA after storm

    My PH usually is rock solid with no increase or decrease. I keep my TA at 70 as that is where my pool likes to be to keep my PH steady. I'm increasing my CH to 300 to help with my CSI.
    5900 G Fiberglass IG pool (circa 1990), SWG Hayward Aqua Rite GoldLine (2013), IntelliFlo Variable Speed Pump (2013), Hayward Pro Sand Filter (circa 1990), Well water (no iron or other metals fortunately), test with Taylor K2006C, Charleston, SC

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    Mod Squad tim5055's Avatar
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    Re: CYA after storm

    Quote Originally Posted by otter86753 View Post
    My PH usually is rock solid with no increase or decrease. I keep my TA at 70 as that is where my pool likes to be to keep my PH steady. I'm increasing my CH to 300 to help with my CSI.
    Excellent!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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