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Thread: CYA Test. No Reading?

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    CYA Test. No Reading?

    When I test my CYA, I literally fill the cylinder to its rim and can still view the black dot on the bottom. What should I assume is my reading? 10? 5? 0? And am I to also assume I have no stabilizer in my pool? Pool math indicates I should add 97oz of it to reach 30. This is the first year I've tested in April and experienced such a read so am a little alarmed.

    I bought 2 of these earlier today: Pool Time 23417PTM 5 lb. Chlorine Stabilizer .

    How would you recommend I distribute it into my pool? The directions say to spread in throughout my deep end but my pool vacuum would quickly suck it up.

    Thanks!
    28k gallon in-ground pebbletec pool w/waterfall and grotto feature
    Triton II sand filter
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    Richard320's Avatar
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    Re: CYA Test. No Reading?

    Assume it's twenty and work up to it in steps so you don't overshoot.

    How to add the various chemicals is explained in Pool School - Recommended Pool Chemicals
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Mod Squad jblizzle's Avatar
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    Re: CYA Test. No Reading?

    So you had cya when you close now you opened and you're not showing any? If so you might want to do a test to see if you have ammonia before adding any cya. Just raise the FC to 10 PPM and retest in 10 minutes and Report the FC and CC.
    Jason, TFP Moderator
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    Re: CYA Test. No Reading?

    Thanks, Richard.

    One more question: Should I shoot for a 30 reading? The chart indicates anything between 30-60 is acceptable but what is considered optimal?
    28k gallon in-ground pebbletec pool w/waterfall and grotto feature
    Triton II sand filter
    "The Pool Cleaner" 4-wheel vacuum
    1.5hp main pump; 1.5hp water feature pump
    Taylor K2006 test kit

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    Richard320's Avatar
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    Re: CYA Test. No Reading?

    Quote Originally Posted by asusundevil View Post
    Thanks, Richard.

    One more question: Should I shoot for a 30 reading? The chart indicates anything between 30-60 is acceptable but what is considered optimal?
    In Arizona, shoot for 50. Some people even go higher. But again, it's really easy to add more, hard to eliminate excess.
    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: CYA Test. No Reading?

    Quote Originally Posted by jblizzle View Post
    So you had cya when you close now you opened and you're not showing any? If so you might want to do a test to see if you have ammonia before adding any cya. Just raise the FC to 10 PPM and retest in 10 minutes and Report the FC and CC.
    I reside in AZ so we don't close/cover our pools. Essentially, throughout the winter I test maybe once every three weeks. When it begins to warm up, like it has been the past month, I begin to prepare for the summer. Today was my first CYA test of the year. Unfortunately, I can't remember what it was when summer ended last year but know it wasn't 10-20.

    - - - Updated - - -

    Quote Originally Posted by Richard320 View Post
    In Arizona, shoot for 50. Some people even go higher. But again, it's really easy to add more, hard to eliminate excess.
    Is the high risk of algae at a lower FC level the rationale behind folks in AZ shooting for 50
    28k gallon in-ground pebbletec pool w/waterfall and grotto feature
    Triton II sand filter
    "The Pool Cleaner" 4-wheel vacuum
    1.5hp main pump; 1.5hp water feature pump
    Taylor K2006 test kit

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    Mod Squad jblizzle's Avatar
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    Re: CYA Test. No Reading?

    No the higher cya protects FC the from the Sun.

    We've been swimming for over a month what you waiting for
    Jason, TFP Moderator
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    Re: CYA Test. No Reading?

    Man, swimming already for a month? That's, as they say, "cray cray."

    - - - Updated - - -

    So each of these containers of stabilizer I purchased from Home Depot is 5lbs. When I use pool math, its recommended I distribute 112oz (by weight indicates 7lbs) or 117oz (by volume). When I hold one of these 5lb containers in my hand and visualize pouring the entire thing into my pool, +2 additional lbs, it makes me uncomfortable. As such, I instead poured 1/2 of the 5lb container into my skimmer (with skimmer sock).

    Just tested and here are my numbers:

    CYA - Assuming 20
    PH - 8.2
    FC - 4
    CC - 1
    TA - 100
    CH - forgot to test
    28k gallon in-ground pebbletec pool w/waterfall and grotto feature
    Triton II sand filter
    "The Pool Cleaner" 4-wheel vacuum
    1.5hp main pump; 1.5hp water feature pump
    Taylor K2006 test kit

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    Re: CYA Test. No Reading?

    Isn't 50 a little low for a SWG pool? I thought the recommendation was 60-80. I'm in Tucson also - mine is currently 100 due to a Leslie's mess up.
    In-Ground Pebble Tec installed 2005/10,000 gallons/Magna Sweep cleaning system/RJ-30 Circupool SWG/Rock Waterfall/Hayward Ecostar SP3400 VS pump/Hayward Swimclear C3025 cartridge filter/Hayward H400IDL2 gas heater

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    Re: CYA Test. No Reading?

    Dooger54 - Not sure if your question was in reference to my pool but mine is not salt water.
    28k gallon in-ground pebbletec pool w/waterfall and grotto feature
    Triton II sand filter
    "The Pool Cleaner" 4-wheel vacuum
    1.5hp main pump; 1.5hp water feature pump
    Taylor K2006 test kit

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    Re: CYA Test. No Reading?

    Get your pH down to 7.5 or so, then proceed.
    Dave S.
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    Re: CYA Test. No Reading?

    Quote Originally Posted by asusundevil View Post
    Dooger54 - Not sure if your question was in reference to my pool but mine is not salt water.
    I was referencing jblizzle pool. Just questioning why he keeps his salt pool at 50 CYA. everything I read here suggests 60-80. I would think the sun here in Tucson would make the goal closer to the 80 number. Course I'm new here and could be completely off base.
    In-Ground Pebble Tec installed 2005/10,000 gallons/Magna Sweep cleaning system/RJ-30 Circupool SWG/Rock Waterfall/Hayward Ecostar SP3400 VS pump/Hayward Swimclear C3025 cartridge filter/Hayward H400IDL2 gas heater

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    Mod Squad jblizzle's Avatar
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    Re: CYA Test. No Reading?

    Who says I keep it at 50? I keep mine at 80, or I did when I was running SWG last year. Cell died and I have not replaced yet.

    Richard was talking about targeting 50, with the assumption of a non SWG pool.
    Jason, TFP Moderator
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    Re: CYA Test. No Reading?

    Quote Originally Posted by asusundevil View Post
    Man, swimming already for a month? That's, as they say, "cray cray."

    - - - Updated - - -

    So each of these containers of stabilizer I purchased from Home Depot is 5lbs. When I use pool math, its recommended I distribute 112oz (by weight indicates 7lbs) or 117oz (by volume). When I hold one of these 5lb containers in my hand and visualize pouring the entire thing into my pool, +2 additional lbs, it makes me uncomfortable. As such, I instead poured 1/2 of the 5lb container into my skimmer (with skimmer sock).

    Just tested and here are my numbers:

    CYA - Assuming 20
    PH - 8.2
    FC - 4
    CC - 1
    TA - 100
    CH - forgot to test
    Next CYA addition, put the CYA into an old sock, close up the end and hang it in front of a running return. With a bit of squeezing it will dissolve in no time.


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    Re: CYA Test. No Reading?

    Quote Originally Posted by jblizzle View Post
    Who says I keep it at 50? I keep mine at 80, or I did when I was running SWG last year. Cell died and I have not replaced yet.

    Richard was talking about targeting 50, with the assumption of a non SWG pool.
    My bad. Went back and read again. Wasn't criticizing, just trying to understand so I can get mine right.


    In-Ground Pebble Tec installed 2005/10,000 gallons/Magna Sweep cleaning system/RJ-30 Circupool SWG/Rock Waterfall/Hayward Ecostar SP3400 VS pump/Hayward Swimclear C3025 cartridge filter/Hayward H400IDL2 gas heater

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