CYA testing...and the black dot magic trick

[Killer01ws6]

Glance at the dot. When you don’t see the dot you are done.

CYA Testing - Further Reading

www.troublefreepool.com

As much as possible you should do the CYA test in the same consistent light conditions:

• Outside in full sun or use the brightest indirect indoor light that you can if you have to test at night
• Back to sun
• Don't stare at the dot as you pour
• Fill to a line, hold the tube waist high, and glance at the dot
• If you see the dot fill to the next line and glance at the dot
• When the dot disappears you round up to the previous line. If you saw the dot at 40 and not at 30 then you call it 40

THIS... is the best explanation I have seen in my short time of figuring this out. I have had flux readings myself and never sure why.. I do all of what you say, but I do stare at the dot, even have it go away, then look harder and see it, start adding more water then wonder why I am at 50 again haha..

Tnks for the clarity on my cloudy little CYA bottle heh.

 

[ralphsyv]

Glance at the dot. When you don’t see the dot you are done.

CYA Testing - Further Reading

www.troublefreepool.com

As much as possible you should do the CYA test in the same consistent light conditions:

• Outside in full sun or use the brightest indirect indoor light that you can if you have to test at night
• Back to sun
• Don't stare at the dot as you pour
• Fill to a line, hold the tube waist high, and glance at the dot
• If you see the dot fill to the next line and glance at the dot
• When the dot disappears you round up to the previous line. If you saw the dot at 40 and not at 30 then you call it 40

THIS... is the best explanation I have seen in my short time of figuring this out. I have had flux readings myself and never sure why.. I do all of what you say, but I do stare at the dot, even have it go away, then look harder and see it, start adding more water then wonder why I am at 50 again haha..

Tnks for the clarity on my cloudy little CYA bottle heh.

Yes! CYA can be tricky to determine. It's because of persistence of vision (when you stare at something 30 seconds, it's fixed in your eyes). Thanks, @ajw22 !!!!!!

 

[Chuckiechan]

What I do is after the first or second visual, I fill the reading tube to where I want it to be and see if I see the dot. From there can feel “close enough”.

 

[Newdude]

What I do is after the first or second visual, I fill the reading tube to where I want it to be and see if I see the dot. From there can feel “close enough

CmonCmonCmonCmonCmonCmon………. OH THANK GAWD !!!!! A 70. *phew*.

*also, Same.