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Thread: My CYA level vs. pool store

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    My CYA level vs. pool store

    Hola!

    I went to the pool store twice to have levels checked against my results on my new test kit (TF-100). The first time I got 50 ppm for CYA level and the pool store got 60 ppm. I shut off our trichlor tab feeder and retested today and got 45ish ppm. Pool store got 70 ppm. I did my test twice and got 45-50ish both times. I'm just wondering if I should trust my number or pool store number more.
    The PB told me that even if the tab feeder is "off" it has some flow through it so will add small amount of chlorine and stabilizer. (Same PB also told me there is no stabilizer in trichlor tabs ) I'd like to get the tabs out of the feeder so over time it doesn't get gunked up, but they are so snug in there that there isn't room to pry them up and out. Any ideas?
    12K IG gunite, Pentair Intelliflo pump and 1 hp Pentair booster pump, Posi-Clear Sta-rite cartridge filter, IntelliChlor SWG and EasyTouch system.

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    dmanb2b's Avatar
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    Re: My CYA level vs. pool store

    Trust your numbers...be done with the pool store. I have not been in mine in 3 years except at the end of the season to buy pool toys, leaf nets, etc 50% off.

    Let the tabs that are in there disolve. It won't cause CYA to rise that much, just don't replace them
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Richard320's Avatar
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    Re: My CYA level vs. pool store

    Trust yourself. In case you didn't know...you can pour the sample back and forth between the mixing bottle and the reading tube to check yourself. When you keep getting the same reading +/- 5 or so, that's your number.

    If the pucks are really wedged in, let them dissolve a bit so you have some wiggle room. But then you'll have to dispose of them. You may just have to let them dissolve all the way.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: My CYA level vs. pool store

    Quote Originally Posted by dmanb2b
    Trust your numbers...be done with the pool store. I have not been in mine in 3 years except at the end of the season to buy pool toys, leaf nets, etc 50% off.

    Let the tabs that are in there disolve. It won't cause CYA to rise that much, just don't replace them
    I have no plans on replacing those tabs. The PB tried to tell me that bleach has too many dissolved solids and wasn't good for my pool and that I'd have a hard time keeping it clear.
    12K IG gunite, Pentair Intelliflo pump and 1 hp Pentair booster pump, Posi-Clear Sta-rite cartridge filter, IntelliChlor SWG and EasyTouch system.

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    Re: My CYA level vs. pool store

    Quote Originally Posted by Richard320
    Trust yourself. In case you didn't know...you can pour the sample back and forth between the mixing bottle and the reading tube to check yourself. When you keep getting the same reading +/- 5 or so, that's your number.
    Now I feel like a total dolt. Makes sense but just didn't even occur to me. I actually did the whole procedure twice. lol Good to know!
    12K IG gunite, Pentair Intelliflo pump and 1 hp Pentair booster pump, Posi-Clear Sta-rite cartridge filter, IntelliChlor SWG and EasyTouch system.

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    dmanb2b's Avatar
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    Re: My CYA level vs. pool store

    Quote Originally Posted by CaraR
    Quote Originally Posted by Richard320
    Trust yourself. In case you didn't know...you can pour the sample back and forth between the mixing bottle and the reading tube to check yourself. When you keep getting the same reading +/- 5 or so, that's your number.
    Now I feel like a total dolt. Makes sense but just didn't even occur to me. I actually did the whole procedure twice. lol Good to know!
    That makes at least two of us That's what I love about TFP, we are all here to help each other
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    no-mas's Avatar
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    Re: My CYA level vs. pool store

    FWIW, you don't need to check the CYA all that frequently. Unless something has happened to cause you to want to check more frequently, monthly is usually ok.
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    poolgirl22's Avatar
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    Re: My CYA level vs. pool store

    Quote Originally Posted by CaraR
    Quote Originally Posted by dmanb2b
    Trust your numbers...be done with the pool store. I have not been in mine in 3 years except at the end of the season to buy pool toys, leaf nets, etc 50% off.

    Let the tabs that are in there disolve. It won't cause CYA to rise that much, just don't replace them
    I have no plans on replacing those tabs. The PB tried to tell me that bleach has too many dissolved solids and wasn't good for my pool and that I'd have a hard time keeping it clear.
    Yep...and my pool store told me the water out of my tap had CYA in it...
    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump
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    Re: My CYA level vs. pool store

    Yep...and my pool store told me the water out of my tap had CYA in it...
    That just goes to show you how little they know.

    Glad you found TFP! You'll be glad you did
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    Indiana, ABG 24'x52" Galveston by Blue Cascade (Craigslist buy w/part of deck included), 13,500 gallons, Intex SWG, solar panels mix 2, TF-100 test kit.

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    Re: My CYA level vs. pool store

    Quote Originally Posted by no-mas
    FWIW, you don't need to check the CYA all that frequently. Unless something has happened to cause you to want to check more frequently, monthly is usually ok.
    Yeah, thanks. I was only testing that frequently because when we took possession of the house I did initial tests. Then after filling the tab feeder for the 2 weeks before we moved in, I wanted to see how it changed with the tabs. Since there is a learning curve with the test, I was using it as a chance to "practice" with the new test kit.
    12K IG gunite, Pentair Intelliflo pump and 1 hp Pentair booster pump, Posi-Clear Sta-rite cartridge filter, IntelliChlor SWG and EasyTouch system.

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    Froboz's Avatar
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    Re: My CYA level vs. pool store

    I agree with the others, your numbers will be much more accurate. We recently bought a house with a pool and the pool store told me that my CYA was 60 when in reality it is more like 160.
    14,000 Gallon In-Ground/Pebble Tec
    Hayward Star Clear C1200
    Hayward Super Pump 1HP

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    ivyleager's Avatar
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    Re: My CYA level vs. pool store

    Trust the TF100 kit. I have CYA of 30 at open, used pucks and left over di-chlor for shock, got my CYA to a nice 60ppm level which is where my pool likes to be. When I went to pool store to get some muriatic acid, on a whim, I brought a water sample. All #'s were pretty darn close, but they tested my CYA at 20! I ignored their recommendation to add stabilizer. Went back about a month later for some more muriatic acid, again they tested my CYA, but reading this time was 60! I had done nothing but add bleach in btw tests. So, trust your test kit reading.
    CaryB
    36 x 18 IG vinyl, 25K, 1 HP pump, sand filter
    1 skimmer, 2 returns, no main drain
    Old school: PoolSolutions test kit

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    Re: My CYA level vs. pool store

    Well... One word of caution... I was frustrated by the difference between MY CYA readings and the pool store. (The test results from the poolstore and their recomendations are pure entertainment from me)...

    Turns out that it was my fault.

    Here's what I would do:

    Go poolside, check my CYA readings. Grab a sample.

    Drive out to the pool store. Wait in line for them to check my water.

    And, they would always come up with higher readings.

    One day I asked: Why are your readings always higher? I think you need to calibrate your machine. Then they showed me that they don't use the machine for the CYA test because it's not accurate. They used the same test that I was using.

    HUH? Is my eyesight that bad?

    Without a heater in the pacific northwest, my water temperature is pretty cold. Turns out that by the time I got the sample to the pool store, it would warm up enough to effect a different reading.

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    Re: My CYA level vs. pool store

    Trust the TF-100. If for no other reason than you care more about the care with which you perform the test.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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