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Thread: CYA for my scenario

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    CYA for my scenario

    Tampa, FL
    Full sun from about 1130am
    Screen enclosure
    Firing up SWG this weekend


    Based on everything that I have read and the recommendations for Salt Water Systems in full sun I need to be at the high end of the spectrum do you agree?

    Thank you
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
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    Texas Splash's Avatar
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    Re: CYA for my scenario

    I would certainly start at a CYA of 70 and if you need more based on FC loss, then increase from there. Always easier to go up than down.
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    Richard320's Avatar
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    Re: CYA for my scenario

    Target 80. But if it turns out mathematically that to do so would require 1.1 canisters of CYA, settle for less so it comes out nice and even. The range is 70-80, so you'd still be covered.
    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.
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    Re: CYA for my scenario

    Ok, thanks, i am at 50 to 60 now, going to test again now to confirm and see how much more i need, .
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
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    Re: CYA for my scenario

    I am at 60, so i will take it up to 70 and retest
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
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    Re: CYA for my scenario

    Well, my experience with screens would actually suggest less. That screen blocks an incredible amount of UV (you have to run your heater all summer, right?)

    The UV that actually touches your pool is probably only 70% of a pool without a screen.

    I would suggest a CYA of 50 ppm to start perhaps moving to 60 as the summer progresses
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: CYA for my scenario

    Quote Originally Posted by duraleigh View Post
    Well, my experience with screens would actually suggest less. That screen blocks an incredible amount of UV (you have to run your heater all summer, right?)

    The UV that actually touches your pool is probably only 70% of a pool without a screen.

    I would suggest a CYA of 50 ppm to start perhaps moving to 60 as the summer progresses
    You are correct that it blocks about 30% of the suns rays. I don't think I will need it through the summer unless I wanted the temp regularly closer to 90 but time will tell. We seem to like the temp between 84 and 86 as adults. Kids are fine down to 80 or so for sure or even less. We will probably be setting the solar to cut off at about 83 and let the sun heat is up a few more degrees through the afternoon. Right now it is dropping down to about 79 overnight.

    The last several days, I have been losing 3-4 ppm of Chlorine daily I believe but I have not been methotical about checking the before and after, just making adjustments as needed as I have been bringing my CYA up. It is getting to be about 90 in temperature and we are swimming just about every day and when we swim, it is up to 7 kids with just my family. Today, there were 9 in there for a few hours and went from 5 to 1.5 in CL from last night to tonight.

    So, 3 answers, 50, 70 and 80.

    I definitely don't want to go too high. Thanks for your help.
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
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    Re: CYA for my scenario

    Quote Originally Posted by mgmoore7 View Post
    So, 3 answers, 50, 70 and 80.
    Sounds like 66.6 to me. With an auto cover I keep 50 / 60, its closed most of the time and it blocks nearly all the light.
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    Re: CYA for my scenario

    Quote Originally Posted by bobby1017 View Post
    Sounds like 66.6 to me. With an auto cover I keep 50 / 60, its closed most of the time and it blocks nearly all the light.
    Don't like that number much at all.
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
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    Richard320's Avatar
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    Re: CYA for my scenario

    Well, actually, I missed the part about screened, so 80 is probably too high, even with a SWG.
    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 for my scenario

    Ok, i had put more cya in the skimmer but pulled it. It is at 60 now and will leave ir there for now.
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
    SWG Run Time Calculator

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    Re: CYA for my scenario

    I think you will find yourself right in the sweet spot.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: CYA for my scenario

    Ok, thanks
    Matt
    2016 Pool Build: 12k IG Blue Granite Pebblesheen, Travertine Coping & Pavers, Pentair IntelliFlo, Intellichlor, Easytouch, Clean & Clear 320, Heliocol Solar - TF-100 test kit w/ SpeedStir
    SWG Run Time Calculator

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