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Thread: CYA in SWG

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    boston62's Avatar
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    CYA in SWG

    does rain water reduce your CYA in your pool? I can't seem to get this below 100 ppm, use to be until I was told to add stabilizer by a store before I had my Taylor 2006 kit, and now it's over 100 ppm...I think I will drop the water by 6" everyday, and add water until it's down...Thanks for any help...
    13,000 Gal Pool & Spa
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    Re: CYA in SWG

    Only if you get enough rain to overflow or you pump water out.
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    Re: CYA in SWG

    Quote Originally Posted by jblizzle View Post
    Only if you get enough rain to overflow or you pump water out.
    I will pump it out, I had added a 2" ball valve to my line before the filter which I am using to lower the pool water...will drop it everyday until I get a good CYA.. Thank you for the info...
    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    Have you done a dilution test to get an estimate of what your cya really is? 6" is how many gallons in your pool? You will want to do as few drains and refills as possible without hurting your pool to cut down the amount of water it will take to get you to the number you're targeting.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
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    Re: CYA in SWG

    Quote Originally Posted by timerguy View Post
    Have you done a dilution test to get an estimate of what your cya really is? 6" is how many gallons in your pool? You will want to do as few drains and refills as possible without hurting your pool to cut down the amount of water it will take to get you to the number you're targeting.
    the pool is 13000 gal, I tested it this morning and it is now at 80....when is the best time to test, morning or late afternoon, with pump running or not...

    I tested it with the pump shut off, and in the late afternoon it was 80 which is what I am after, but that morning it was over 100...unless I was reading it wrong, I read it in the house, then after that outside with more light, that's when it was 80...

    Thanks for the tip on draining...
    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    You would want to add water, run the pump to mix the "new" water in and then test your CYA. Likely give it an hour to circulate just to be sure.
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    Re: CYA in SWG

    Quote Originally Posted by jblizzle View Post
    Only if you get enough rain to overflow or you pump water out.
    I think pumping water out doesn't lower your CYA, adding water does...I that's what you meant, I only lower it when it gets to high.

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
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    Re: CYA in SWG

    Quote Originally Posted by boston62 View Post
    I think pumping water out doesn't lower your CYA, adding water does...If that's what you meant, I only lower it when it gets to high.

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    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    Quote Originally Posted by boston62 View Post
    I think pumping water out doesn't lower your CYA, adding water does...I that's what you meant.
    It's kind of like splitting hairs but yes pumping water out doesn't lower or even change the CYA level a bit.
    BUT most people have to pump water out to make room for the CYA "clean" water you will be adding to dilute the highly CYA dosed water left in the pool so it's easier to talk about the water needing to be dumped.

    So, , , pumping water out doesn't lower CYA it just makes room for the water you need to add to dilute what's left and have water that's at a reasonable CYA level.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
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    Re: CYA in SWG

    I understand, here in Florida it seems we keep taking water out due to rain, haven't had to lower or raise the cya yet, but I watch it. I test FC & PH everyday, then everything once a week until I get to know my pool. Pickup a bad habit at first, going to the pool store.

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    Actually, draining excess water does remove some cya to the extent that the rain water dilutes whatever cya is already there at least a small amount. But, you're right that the best way to reduce cya is to replace water that you've drained. On the other hand evaporating water actually increases cya ppm until you dilute it to the water level it was originally prior to evaporation.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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    Re: CYA in SWG

    Yes that is correct, if I want to raise my FC & CYA can I just drop a 3" tablet in the strainer, and keep an eye on it?

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    When I was using trichlor pucks for chlorine. It would take the better part of a week to dissolve them. Too slow to add enough cya to combat the suns effect of burning off chlorine. I'd put 5 pucks in a floater to keep my FC up when I went on a weeks vacation. I also used some leftover puckks when I overshot lowering to 50 ppm it took almost a week to get it back to where I wanted it.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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    Re: CYA in SWG

    Last time I tried to raise my CYA from 50 which the pool store told me to add stabilizer, it went right off scale...then took over a week to get it down...

    Right now its at 80 which is fine,

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    Ahhhhhh, but you were depending on the pool stores telling you your cya was 50 right? Leslies was telling me mine was 40 for months until I got my own test kit and found it to be over 350. 5 8000 gal drains and refills later my cya was only 25 and that's when it took a week of pucks in my skimmers to get it back up to the 50 I wanted it to be.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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    Re: CYA in SWG

    Yes, but not anymore....I shop now at Walmart for baking soda & 20 mule team borax. I only get MA & Chlorine at pinch a penny pool store which is cheap.

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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    Re: CYA in SWG

    How old is your pinch a penny bleach??? I've been to several dollar stores to check them out. Most everywhere I've gone had bleach that was 5 to 6 months old or more. When I need bleach, I go to Wally world. That's also where I get my cya. < $20 for a 6.5 lb bottle of my Salt Pool 100% cya Stabilizer
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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    boston62's Avatar
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    Re: CYA in SWG

    I just take my jugs in and they fill them up with chlorine, the MA was $8 and change for 2 gal. Will check the cya out at Walmart. Thanks

    13,000 Gal Pool & Spa
    Jandy Automation /w IAqualink
    Autopilot SWG
    Jandy 2.0 HP VSP, Filter Cartridge
    Taylor (FAS-DPD K-2600, Pool Surface: Plaster

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