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Thread: CYA is currently at 100 for a SWG IG pool

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    CYA is currently at 100 for a SWG IG pool

    Should I lower my CYA down to lets say 70 from 100 where it currently is ?? Could I just set the SWG at a higher % because of the CYA level of 100 ??
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Richard320's Avatar
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    Re: CYA is currently at 100 for a SWG IG pool

    If you maintain adequate minimum FC levels for the CYA, I see no problem. Unless you get algae. Poolmath suggests minimum FC of 5 for a SWG pool with 100 CYA. I'd aim a bit higher, but below 10. That way your pH test will still be valid.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: CYA is currently at 100 for a SWG IG pool

    Thx Rich
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: CYA is currently at 100 for a SWG IG pool

    Remember, 100 is the limit of the CYA test. Have you done a diluted test to verify that is is 100?

    You mentioned in another post using test strips. Are you still using them?
    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 is currently at 100 for a SWG IG pool

    Quote Originally Posted by tim5055 View Post
    Remember, 100 is the limit of the CYA test. Have you done a diluted test to verify that is is 100?
    The aquachek strips I have go up to 300 for CYA/Stabilizer. I do have the T100 kit I purchased here though. Also, I should point out the water temp is around 50*
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: CYA is currently at 100 for a SWG IG pool

    Please ... throw the strips away. They only lead to confusion.
    Jason, TFP Moderator
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    Re: CYA is currently at 100 for a SWG IG pool

    That bad?? So simple though LOL
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Mod Squad jblizzle's Avatar
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    Re: CYA is currently at 100 for a SWG IG pool

    Quote Originally Posted by Donny View Post
    That bad??
    Yes ... worse than pool store testing
    Jason, TFP Moderator
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    Mod Squad pooldv's Avatar
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    Re: CYA is currently at 100 for a SWG IG pool

    Here are instructions for extended testing, http://www.troublefreepool.com/threa...Kit-Directions
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    Re: CYA is currently at 100 for a SWG IG pool

    Use the TF100, throw away the strips.

    You need a valid CYA test before you do anything
    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 is currently at 100 for a SWG IG pool

    Thanks guys. I will compare the two recent tests. I must say though, I have done this in the past and the Aquachek has been very very close with my TF100 test results. Granted, the strips can not measure in between the 100 and 150 mark on the CYA, I do see your point. What if I'm at 130 ??? OK, I will use the TF100 now. Thx again.

    UPDATE: completed test with TF100 as recommended, CYA is at 110.
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: CYA is currently at 100 for a SWG IG pool

    You did a diluted test and came up with 55? The CYA test doesn't go up to 110.



    *******On Edit

    I was on my iPhone, so it was hard to type. If the CYA test is at 100 or above you need to do a second diluted test. If it's just a "little" above 100 on the test you can't equate that to any 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 is currently at 100 for a SWG IG pool

    Your cell recommends a level of 60-80 with 80 recommended. Unless you're having problems, you can probably let it run where it is and let the cya fall naturally. Especially once you get kids splashing in the pool early in the season, or if you've have a lot of rain in your area, you may see it fall on its own. Just keep the FC a bit higher for a bit.

    That's the route I'd take.
    Gary
    21k gal SW, IG Gunite PebbleSheen, 1HP Jandy, Jandy 340 filter, Polaris 280, 17' fiberglass slide w/ 2HP pump.

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    Re: CYA is currently at 100 for a SWG IG pool

    Quote Originally Posted by tim5055 View Post
    You did a diluted test and came up with 55? The CYA test doesn't go up to 110.



    *******On Edit

    I was on my iPhone, so it was hard to type. If the CYA test is at 100 or above you need to do a second diluted test. If it's just a "little" above 100 on the test you can't equate that to any number.
    Yes exactly, it seemed to be slightly over 100. I had to ask myself "is it 100 or over 100" several times. OK, off to take another test !!

    *****UPDATE: 50 on the diluted test.
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Re: CYA is currently at 100 for a SWG IG pool

    Quote Originally Posted by Donny View Post
    Yes exactly, it seemed to be slightly over 100. I had to ask myself "is it 100 or over 100" several times. OK, off to take another test !!

    *****UPDATE: 50 on the diluted test.
    Yea, when it gets around 100 you start wondering.....

    So, 100 it is!

    It will be up,to you as to weather you dump water and get it where it should be or stay extra vigilant and keep,the FC where it needs to be for 100 and ride it down with splash out, rain and smaller water replacements. Toping off evaporation does not count because the CYA does not evaporate. With luck 3 - 4ppm degrades per month, plus splashout may get you there in a season.
    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 is currently at 100 for a SWG IG pool

    Thanks for the help Tim. I'm going to drain some water and get the CYA down a little. I do prefer the levels be balanced as per recommendations here. Thx again!
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    Mod Squad tim5055's Avatar
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    Re: CYA is currently at 100 for a SWG IG pool

    Quote Originally Posted by Donny View Post
    Thanks for the help Tim. I'm going to drain some water and get the CYA down a little. I do prefer the levels be balanced as per recommendations here. Thx again!
    not a problem! We wouldn't be here if we didn't want to help.

    Asking questions is how you learn, so ask away.....
    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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    Mod Squad pooldv's Avatar
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    Re: CYA is currently at 100 for a SWG IG pool

    Quote Originally Posted by Donny View Post
    Thanks for the help Tim. I'm going to drain some water and get the CYA down a little. I do prefer the levels be balanced as per recommendations here. Thx again!
    Good plan!
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    Re: CYA is currently at 100 for a SWG IG pool

    Operating your pool at CYA over 80 is problematic.

    There are certainly some seasoned veterans who monitor their pools closely who can get away with it but the potential issues are simply not worth it.

    Just like we say in Pool School, 60-80 CYA if you have an SWG is the suggested value. (Somewhere around 40-50 if you chlorinate manually)
    Dave S.
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    Re: CYA is currently at 100 for a SWG IG pool

    Thanks again everyone!
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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