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!
Question about lowering CYA
- Thread starter GinaLovesSummer
- Start date
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.
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.
- May 23, 2015
- 24,381
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
It hurts now but you'll be a lot happier when all that excess CYA is gone.
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.
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!
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.