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Thread: Question about lowering CYA

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    Question about lowering CYA

    As I am draining my pool can I test the water for CYA or do I have to drain then refill then test with pool full of water. Finally biting the bullet and lowering it. I used the pool math calculator and it says 50% so that's roughly where I am going with it. Thanks!
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: Question about lowering CYA

    Quote Originally Posted by GinaLovesSummer View Post
    As I am draining my pool can I test the water for CYA or do I have to drain then refill then test with pool full of water. Finally biting the bullet and lowering it. I used the pool math calculator and it says 50% so that's roughly where I am going with it. Thanks!
    You're testing for relative levels of CYA. Less water with no other changes = same relative level of CYA. Like when you're testing the level in the pool by using a small sample of water. So 1 ounce of that water is the same as 10,000 gallons. Unless you introduce new CYA-free water to dilute the overall CYA content of your pool it will always read the same.
    Geebot
    Chicago, IL
    30K gal, InGround Plaster Finish, 3.5'-9.5', Maytronics S300 Cleaner

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    domct203's Avatar
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    Re: Question about lowering CYA

    Quote Originally Posted by GinaLovesSummer View Post
    As I am draining my pool can I test the water for CYA or do I have to drain then refill then test with pool full of water. Finally biting the bullet and lowering it. I used the pool math calculator and it says 50% so that's roughly where I am going with it. Thanks!
    No sense checking the remaining water, it will be the same as the CYA is evenly distributed throughout.

    Check it after you complete the refill.
    Dom - TFP Guide
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    JoyfulNoise's Avatar
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    Re: Question about lowering CYA

    Quote Originally Posted by GinaLovesSummer View Post
    As I am draining my pool can I test the water for CYA or do I have to drain then refill then test with pool full of water. Finally biting the bullet and lowering it. I used the pool math calculator and it says 50% so that's roughly where I am going with it. Thanks!
    It hurts now but you'll be a lot happier when all that excess CYA is gone.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Question about lowering CYA

    That's what I figure. Might as well get it right and slam properly so that when I close for the winter I am not kicking myself for not lowering it. In the beginning of the summer I was being pool stored and that's why I have a CYA of 110. I read it wrong when I first started testing. I figure fix it right this year and hopefully be running smooth next year.
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: Question about lowering CYA

    The good news is right after I finished draining what I wanted we started getting flooding rains so the pool filled super fast! Woo Hoo! Gonna wait for the sun tomorrow to retest my CYA!
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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    Re: Question about lowering CYA

    EXCELLENT planning!
    16X32 AB, Pentair SD filter, 3/4hp Pentair Optiflo, CircuPool RJ30+ swg, TF 100

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    Re: Question about lowering CYA

    Where did your CYA end up, Gina?

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    Re: Question about lowering CYA

    It ended up at a 60 which I figure at least I can manage for the rest of the season. Plus I will drain part off to winterize once the water gets consistently down to 60 degrees.
    22' Round x 52" deep Coleman AGP, 12,500 gallons. Filled 5-1-16. XtremePowerUSA 4500 GPH 19" Sand Filter w/1.5 HP Pump. Hayward Dyna-Skim In The Wall Skimmer. Hard Plumbed w/2" PVC. PVC Aerator. Pentair Kreepy Krauly Lil Shark Above Ground Pool Cleaner. Whitesboro, TX (North Texas). Taylor K-2006 Test Kit Comp Chorine FAS-DPD. Use The Pool Math App By Trouble Free Pool For Logging.

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