CYA testing inside

[BKB]

I saw the post it is best to test cya outdoor with your back to the sun, is there a trick for inside? I've added 5 pound stabilizer. The pool store said it was a 5 after adding. When I pour in, it fades at 50 but I can kinda see it. I don't have the sun option right now. Didn't know if I was being too exact about it disappearing. Thanks, Brenda

 

[ajw22]

Do it with a consistent indoor light and don’t sweat it. If you read it as 50 then that is good.

 

[Newdude]

Put a daylight bulb in the garage or somewhere it won't bother you. (Many hate the surgical white).

Test the next time it's real sunny and compare it to your regular lights, and the daylight area. Then use the closest one whenever it's more convenient.

 

[DrewLG]

is there a trick for inside? .... Didn't know if I was being too exact about it disappearing

Whether you do the test indoors or outdoors, you can calibrate your eye with this 50ppm CYA solution: R-7065 CYA Standard 50ppm (2oz)

Do the CYA test with it instead of pool water, and see what the dot looks like when the tube is filled to the 50ppm line. That's what the dot should look like when you test your pool water.

Also see what the dot looks like at 70, 60, and 40 ppm, so you'll have an idea of how much difference there is between the measurements.

 

[Scoop]

I ran an Outdoors vs Indoors Comparison Test a while back. I found little to no difference in my test results.

Here's the thread :

CYA Testing Indoors vs Outdoors - Water Temps

Location : Dallas area, Tx It's been a few years since I tested CYA in/outdoors, water temps, etc so I decided to repeat the tests to see my results. I switched to Indoor Testing July '20 after numerous testing showed that the differences between Outdoor Testing, on a clear day around Solar...

www.troublefreepool.com

 

[Jimrahbe]

BKB,

I too have not found any significant difference between doing the test inside or out. I also have other CYA testers and they do not say anything at all about being outside.

I suspect there is 'technically' a small difference, but since the CYA test is very subjective, I think the main thing is to do the test, the same way each time, no matter where you do it.

Obviously, doing it in a dark room with a 20 watt blub is not going to work well, but doing it in a brightly lit room should work just fine, in the big picture.

Thanks,

Jim R.

 

[duraleigh]

Jimrahbe and scoop have it under control. Indoors or out, it is simply not that critical. Taylors directions and TFP directions both make that s little harder than it needs to be. personally, inside is w-a-a-ay more comfortable and closer to an adult beverage

 

[wayner]

personally, inside is w-a-a-ay more comfortable and closer to an adult beverage

I do my tests out in my pool cabana with a fridge that is well stocked with adult beverages. And if you have enough of them then the black dots begin multiplying...

 

[Newdude]

You also care less about being wrong with each beverage.

 

[duraleigh]

You also care less about being wrong with each beverage.

Or, Is it possible that as the adult beverage is consumed, it makes you a REALLY good tester

 

[wayner]

Or, Is it possible that as the adult beverage is consumed, it makes you a REALLY good tester

Like Doctor Johnnie Fever. I can spot the black dot when the CYA level is 100 through 10 feet of cloudy water.